Stus-List Re: water tanks interconnected, or not?

[Peter McMinn via CnC-List]

Apologies for this late follow up. I discovered that when I opened the fill cap 
on the port side, the tanks would *slowly* equalize. I blew out the vents on 
both sides, but this did not seem to improve anything. At least I now can get 
the water distributed and then shut off a tank when full.
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[David Knecht via CnC-List]

During the recent Defender sale, I noticed they had a special on tank monitor I 
had not seen before from LIST.  One and three tank systems with outside 
detectors.  I don’t know anything about them personally, but was tempted (and 
resisted- not that hard to monitor by eye for my boat).  Dave

https://www.defender.com/search.html?q=list+tank+monitor=0=0

S/V Aries
1990 C 34+
New London, CT



Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Doug Mountjoy via CnC-List]

I used a couple of float senders, wired thru a 2 pole switch to a single
level gauge, one pole for each tank sender. The switch is a momentary on
type. The float senders are plastic with a float that slides up and down
the housing. I wish I could remember where I got them. The gauge is just a
2in water level guage.

On Wed, Mar 31, 2021 at 8:38 AM Peter McMinn via CnC-List <
cnc-list@cnc-list.com> wrote:

> Thanks for the ideas. I used my dinghy foot pump to blow out the vent on
> the port tank, which resulted in increased flow from that tank. I think I
> need to replace the senders in both tanks to get accurate readings on tank
> levels. Neighbor on the dock suggests a Tank Tender. Any suggestions?
>
> Peter McMinn
>
>  _/)
>
>
>
> On Wed, Mar 24, 2021 at 6:32 AM Bill Coleman via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> This sounds likely – My usual fix for fixing the prime in the water pump
>> in the spring was to bring a hose on board and blast water into the tank
>> drain, up to the faucet – this would also blast over to the other tank, and
>> likely blow out whatever crud was in the line. Then vacuum out that tank
>> and clean.
>>
>>
>>
>> Bill Coleman
>>
>> Entrada, Erie, PA
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Something is preventing the free flow of water from one of the tanks.  It
>> could be;
>>
>>  - a clog in the hose from the tank to the tee,
>>
>>  - maybe a valve, somewhere in that line that is closed,
>>
>>  - it could be the vent is plugged solid, creating a vacuum.  Which does
>> not allow the water to flow.
>>
>>
>>
>> Given that there is very little head pressure to overcome the vacuum, it
>> wouldn't necessarily take too much of a plug on either side to stop the
>> water flow.
>>
>>
>>
>> Danny
>>
>> -- Original Message --
>> From: Rick Brass via CnC-List 
>> To: "'Stus-List'" 
>> Cc: Rick Brass 
>> Subject: Stus-List Re: water tanks interconnected, or not?
>> Date: Tue, 23 Mar 2021 23:37:40 -0400
>>
>> My 38 also has a tank under the port and starboard settees. Each of the
>> tanks has a shutoff valve at the outlet. The two drain hoses meet at a T
>> under the floorboards, and from this T is the line to the pressure pump.
>>
>>
>>
>> Curiously, there is also a shutoff valve on each side of the T. I could
>> see no good purpose for the second shutoff in each supply line (unless it
>> was there to stop all the water from leaking out through a broken line), so
>> I left them in place when I replaced the hoses a while back.
>>
>>
>>
>> Maybe you have an arrangement like this one?
>>
>>
>>
>> Rick Brass
>>
>> Washington, NC
>>
>>
>>
>>
>>
>>
>>
>> *From:* Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com]
>> *Sent:* Monday, March 22, 2021 7:14 AM
>> *To:* Stus-List 
>> *Cc:* petemcm...@gmail.com; Adam Hayden 
>> *Subject:* Stus-List Re: water tanks interconnected, or not?
>>
>>
>>
>> Peter
>>
>> Very interesting.  I have the same issue except my port tank drains and
>> the Starboard tank does not.
>>
>> Drives me crazy.
>>
>> Adam c 36
>>
>> Sent from my Bell Samsung device over Canada’s largest network.
>>
>>
>> --
>>
>> *From:* Peter McMinn via CnC-List 
>> *Sent:* Monday, March 22, 2021 3:55:08 AM
>> *To:* cnc-list@cnc-list.com 
>> *Cc:* petemcm...@gmail.com 
>> *Subject:* Stus-List water tanks interconnected, or not?
>>
>>
>>
>> I have a 30gal water tank under both settees. The valves for each are set
>> to open flow. However, the pump seems to draw only from the starboard side.
>> I’d assumed that with both valves open, the tanks would equalize, but the
>> stbd tank empties and the pump goes dry, while the port tank remains full.
>> Can someone venture to what’s going on? I’ve read this 2015 discussion
>> <https://cnc-list.com/empathy/thread/2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR?hash=SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F#SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F>,
>> but the OP then was interested in disconnecting the two tanks. I’ll do some
>> exploring tomorrow to see what might be preventing the tanks from
>> equalizing. Ideas are welcome.
>> Thanks to all of the subscribers that contributed to the list to help
>> with the costs involved.  If you want to show your support to the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>> Thanks - Stu
>
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu



-- 
Douglas Mountjoy
253-208-1412
Port Orchard YC, WA
Rebecca Leah
C LandFall 39
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Josh Muckley via CnC-List]

I too have the iSeries tank level monitor from TechEdge.  I was even a Beta
tester.  Generally I like it.  The best thing about it is that you don't
have to penetrate the tank in any way.  The second best thing is that it
can be calibrated in 10% capacity increments which allows it to very
accurately report tank level for odd shaped tanks and it does so in 1%
increments.  I have had a problem with one of my tank level indicators and
can only trace it back to the sensor.  I've tried all the recommendations
except replacing.  It will work with resistance sendors like those on some
liquid propane tanks and I do kinda wish it was capable of interfacing with
N2k.

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Wed, Mar 31, 2021, 12:38 Don Marlin via CnC-List 
wrote:

> The iSeries comes with everything to measure tanks including the senders
> and it cost me about $200cdn.
> I already have a lot of electronics aboard (Raymarine, NMEA200, Raspberry
> Pi, Yatch Devices etc.) but could not bring myself to spend $ on networked
> tank monitoring.
> This is a low tech solution that works fine for us.
>
> One reason I liked it was I did not have to cut into any of the tanks.
> This is a capacitive sensor that sticks on the outside.
> Some folks don't like that but it has worked perfectly even on the holding
> tank.
>
> Anyhow, there are many options but all the others I looked at were more
> intrusive and more expensive.
>
> As always YMMV :-)
>
>
> On Wed, Mar 31, 2021 at 12:30 PM Martin DeYoung via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> Calypso has had the Tank Tender system in place for over 20 years. I
>> monitor the diesel tank and 2 water tanks. Once I learned/charted the
>> correlation between pressure readings and quantity of fluid in each tank it
>> has been very reliable as an indicator.
>>
>> I installed a different type of system in the holding tank that gives
>> “green/yellow/red” light indication of holding tank levels.  That system
>> requires occasional cleaning of the float switches to remain accurate.
>>
>> Martin DeYoung
>> Calypso
>> 1971 C 43
>> Seattle/Port Ludlow
>>
>> On Mar 31, 2021, at 8:38 AM, Peter McMinn via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>> 
>> Thanks for the ideas. I used my dinghy foot pump to blow out the vent on
>> the port tank, which resulted in increased flow from that tank. I think I
>> need to replace the senders in both tanks to get accurate readings on tank
>> levels. Neighbor on the dock suggests a Tank Tender. Any suggestions?
>>
>> Peter McMinn
>>
>>  _/)
>>
>>
>>
>> On Wed, Mar 24, 2021 at 6:32 AM Bill Coleman via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> This sounds likely – My usual fix for fixing the prime in the water pump
>>> in the spring was to bring a hose on board and blast water into the tank
>>> drain, up to the faucet – this would also blast over to the other tank, and
>>> likely blow out whatever crud was in the line. Then vacuum out that tank
>>> and clean.
>>>
>>>
>>>
>>> Bill Coleman
>>>
>>> Entrada, Erie, PA
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Something is preventing the free flow of water from one of the tanks.
>>> It could be;
>>>
>>>  - a clog in the hose from the tank to the tee,
>>>
>>>  - maybe a valve, somewhere in that line that is closed,
>>>
>>>  - it could be the vent is plugged solid, creating a vacuum.  Which does
>>> not allow the water to flow.
>>>
>>>
>>>
>>> Given that there is very little head pressure to overcome the vacuum, it
>>> wouldn't necessarily take too much of a plug on either side to stop the
>>> water flow.
>>>
>>>
>>>
>>> Danny
>>>
>>> -- Original Message --
>>> From: Rick Brass via CnC-List 
>>> To: "'Stus-List'" 
>>> Cc: Rick Brass 
>>> Subject: Stus-List Re: water tanks interconnected, or not?
>>> Date: Tue, 23 Mar 2021 23:37:40 -0400
>>>
>>> My 38 also has a tank under the port and starboard settees. Each of the
>>> tanks has a shutoff valve at the outlet. The two drain hoses meet at a T
>>> under the floorboards, and from this T is the line to the pressure pump.
>>>
>>>
>>>
>>> Curiously, there is also a shutoff valve on each side of the T. I could
>>> see no good purpose 

Stus-List Re: water tanks interconnected, or not?

[Don Marlin via CnC-List]

The iSeries comes with everything to measure tanks including the senders
and it cost me about $200cdn.
I already have a lot of electronics aboard (Raymarine, NMEA200, Raspberry
Pi, Yatch Devices etc.) but could not bring myself to spend $ on networked
tank monitoring.
This is a low tech solution that works fine for us.

One reason I liked it was I did not have to cut into any of the tanks.
This is a capacitive sensor that sticks on the outside.
Some folks don't like that but it has worked perfectly even on the holding
tank.

Anyhow, there are many options but all the others I looked at were more
intrusive and more expensive.

As always YMMV :-)


On Wed, Mar 31, 2021 at 12:30 PM Martin DeYoung via CnC-List <
cnc-list@cnc-list.com> wrote:

> Calypso has had the Tank Tender system in place for over 20 years. I
> monitor the diesel tank and 2 water tanks. Once I learned/charted the
> correlation between pressure readings and quantity of fluid in each tank it
> has been very reliable as an indicator.
>
> I installed a different type of system in the holding tank that gives
> “green/yellow/red” light indication of holding tank levels.  That system
> requires occasional cleaning of the float switches to remain accurate.
>
> Martin DeYoung
> Calypso
> 1971 C 43
> Seattle/Port Ludlow
>
> On Mar 31, 2021, at 8:38 AM, Peter McMinn via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
> 
> Thanks for the ideas. I used my dinghy foot pump to blow out the vent on
> the port tank, which resulted in increased flow from that tank. I think I
> need to replace the senders in both tanks to get accurate readings on tank
> levels. Neighbor on the dock suggests a Tank Tender. Any suggestions?
>
> Peter McMinn
>
>  _/)
>
>
>
> On Wed, Mar 24, 2021 at 6:32 AM Bill Coleman via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> This sounds likely – My usual fix for fixing the prime in the water pump
>> in the spring was to bring a hose on board and blast water into the tank
>> drain, up to the faucet – this would also blast over to the other tank, and
>> likely blow out whatever crud was in the line. Then vacuum out that tank
>> and clean.
>>
>>
>>
>> Bill Coleman
>>
>> Entrada, Erie, PA
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Something is preventing the free flow of water from one of the tanks.  It
>> could be;
>>
>>  - a clog in the hose from the tank to the tee,
>>
>>  - maybe a valve, somewhere in that line that is closed,
>>
>>  - it could be the vent is plugged solid, creating a vacuum.  Which does
>> not allow the water to flow.
>>
>>
>>
>> Given that there is very little head pressure to overcome the vacuum, it
>> wouldn't necessarily take too much of a plug on either side to stop the
>> water flow.
>>
>>
>>
>> Danny
>>
>> -- Original Message --
>> From: Rick Brass via CnC-List 
>> To: "'Stus-List'" 
>> Cc: Rick Brass 
>> Subject: Stus-List Re: water tanks interconnected, or not?
>> Date: Tue, 23 Mar 2021 23:37:40 -0400
>>
>> My 38 also has a tank under the port and starboard settees. Each of the
>> tanks has a shutoff valve at the outlet. The two drain hoses meet at a T
>> under the floorboards, and from this T is the line to the pressure pump.
>>
>>
>>
>> Curiously, there is also a shutoff valve on each side of the T. I could
>> see no good purpose for the second shutoff in each supply line (unless it
>> was there to stop all the water from leaking out through a broken line), so
>> I left them in place when I replaced the hoses a while back.
>>
>>
>>
>> Maybe you have an arrangement like this one?
>>
>>
>>
>> Rick Brass
>>
>> Washington, NC
>>
>>
>>
>>
>>
>>
>>
>> *From:* Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com]
>> *Sent:* Monday, March 22, 2021 7:14 AM
>> *To:* Stus-List 
>> *Cc:* petemcm...@gmail.com; Adam Hayden 
>> *Subject:* Stus-List Re: water tanks interconnected, or not?
>>
>>
>>
>> Peter
>>
>> Very interesting.  I have the same issue except my port tank drains and
>> the Starboard tank does not.
>>
>> Drives me crazy.
>>
>> Adam c 36
>>
>> Sent from my Bell Samsung device over Canada’s largest network.
>>
>>
>> --
>>
>> *From:* Peter McMinn via CnC-List 
>> *Sent:* Monday, March 22, 2021 3:55:08 AM
>> *To:* cnc-list@cnc-

Stus-List Re: water tanks interconnected, or not?

[Martin DeYoung via CnC-List]

Calypso has had the Tank Tender system in place for over 20 years. I monitor 
the diesel tank and 2 water tanks. Once I learned/charted the correlation 
between pressure readings and quantity of fluid in each tank it has been very 
reliable as an indicator.

I installed a different type of system in the holding tank that gives 
“green/yellow/red” light indication of holding tank levels.  That system 
requires occasional cleaning of the float switches to remain accurate.

Martin DeYoung
Calypso
1971 C 43
Seattle/Port Ludlow

On Mar 31, 2021, at 8:38 AM, Peter McMinn via CnC-List  
wrote:


Thanks for the ideas. I used my dinghy foot pump to blow out the vent on the 
port tank, which resulted in increased flow from that tank. I think I need to 
replace the senders in both tanks to get accurate readings on tank levels. 
Neighbor on the dock suggests a Tank Tender. Any suggestions?

Peter McMinn
 _/)


On Wed, Mar 24, 2021 at 6:32 AM Bill Coleman via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:
This sounds likely – My usual fix for fixing the prime in the water pump in the 
spring was to bring a hose on board and blast water into the tank drain, up to 
the faucet – this would also blast over to the other tank, and likely blow out 
whatever crud was in the line. Then vacuum out that tank and clean.

Bill Coleman
Entrada, Erie, PA




Something is preventing the free flow of water from one of the tanks.  It could 
be;
 - a clog in the hose from the tank to the tee,
 - maybe a valve, somewhere in that line that is closed,
 - it could be the vent is plugged solid, creating a vacuum.  Which does not 
allow the water to flow.

Given that there is very little head pressure to overcome the vacuum, it 
wouldn't necessarily take too much of a plug on either side to stop the water 
flow.

Danny

-- Original Message --
From: Rick Brass via CnC-List 
mailto:cnc-list@cnc-list.com>>
To: "'Stus-List'" mailto:cnc-list@cnc-list.com>>
Cc: Rick Brass mailto:rickbr...@earthlink.net>>
Subject: Stus-List Re: water tanks interconnected, or not?
Date: Tue, 23 Mar 2021 23:37:40 -0400
My 38 also has a tank under the port and starboard settees. Each of the tanks 
has a shutoff valve at the outlet. The two drain hoses meet at a T under the 
floorboards, and from this T is the line to the pressure pump.

Curiously, there is also a shutoff valve on each side of the T. I could see no 
good purpose for the second shutoff in each supply line (unless it was there to 
stop all the water from leaking out through a broken line), so I left them in 
place when I replaced the hoses a while back.

Maybe you have an arrangement like this one?

Rick Brass
Washington, NC



From: Adam Hayden via CnC-List 
[mailto:cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>]
Sent: Monday, March 22, 2021 7:14 AM
To: Stus-List mailto:cnc-list@cnc-list.com>>
Cc: petemcm...@gmail.com<mailto:petemcm...@gmail.com>; Adam Hayden 
mailto:hayden.a...@hotmail.com>>
Subject: Stus-List Re: water tanks interconnected, or not?

Peter
Very interesting.  I have the same issue except my port tank drains and the 
Starboard tank does not.
Drives me crazy.
Adam c 36
Sent from my Bell Samsung device over Canada’s largest network.


From: Peter McMinn via CnC-List 
mailto:cnc-list@cnc-list.com>>
Sent: Monday, March 22, 2021 3:55:08 AM
To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> 
mailto:cnc-list@cnc-list.com>>
Cc: petemcm...@gmail.com<mailto:petemcm...@gmail.com> 
mailto:petemcm...@gmail.com>>
Subject: Stus-List water tanks interconnected, or not?


I have a 30gal water tank under both settees. The valves for each are set to 
open flow. However, the pump seems to draw only from the starboard side. I’d 
assumed that with both valves open, the tanks would equalize, but the stbd tank 
empties and the pump goes dry, while the port tank remains full. Can someone 
venture to what’s going on? I’ve read this 2015 
discussion<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcnc-list.com%2Fempathy%2Fthread%2F2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR%3Fhash%3DSLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F%23SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F=04%7C01%7C%7C8d72db96242941d39daf08d8f45b06aa%7C84df9e7fe9f640afb435%7C1%7C0%7C637528019072013898%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000=JqgPaF4hW1zmolXa%2BbUFlB9w2CTq6JhqoH1X1%2FgmM9E%3D=0>,
 but the OP then was interested in disconnecting the two tanks. I’ll do some 
exploring tomorrow to see what might be preventing the tanks from equalizing. 
Ideas are welcome.

Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   
https://www.paypal.me/stumurray<https://na01.safelinks.protection.outlo

Stus-List Re: water tanks interconnected, or not?

[Riley Anderson via CnC-List]

The iSeries seems like a good product but for that price, you might as well
go for a Victron Cerbo GX <https://amzn.to/3u8gg4u>, it will read 4
resistive tank senders, 4 temperature sensors, 4 digital inputs (bilge
alarms, open hatches, engine data, etc.), can integrate with all CAN bus
systems including chargers, inverters, battery monitors, and it can
communicate with NMEA2000 devices. All data is recorded and uploaded to
your Victron VRM account (free) and can be accessed anywhere in the world
(with WiFi connection). I use mine to monitor all the water tanks and the
holding tank. It has a programmable relay output and I have mine set to
disable the electric head when the holding tank is full so that it can't be
overfilled. The possibilities are endless.

On Wed, Mar 31, 2021 at 12:11 PM Don Marlin via CnC-List <
cnc-list@cnc-list.com> wrote:

> We use this on our 40.
> The 40 has dual 30G water tanks.
> https://tankedge.com/products.html
>
> I also use it on my holding tank.
> All the tanks are the original Poly.
>
> Been installed for 2 years, I like it.
> Works fine and did not break the bank.
>
>
> On Wed, Mar 31, 2021 at 11:38 AM Peter McMinn via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> Thanks for the ideas. I used my dinghy foot pump to blow out the vent on
>> the port tank, which resulted in increased flow from that tank. I think I
>> need to replace the senders in both tanks to get accurate readings on tank
>> levels. Neighbor on the dock suggests a Tank Tender. Any suggestions?
>>
>> Peter McMinn
>>
>>  _/)
>>
>>
>>
>> On Wed, Mar 24, 2021 at 6:32 AM Bill Coleman via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> This sounds likely – My usual fix for fixing the prime in the water pump
>>> in the spring was to bring a hose on board and blast water into the tank
>>> drain, up to the faucet – this would also blast over to the other tank, and
>>> likely blow out whatever crud was in the line. Then vacuum out that tank
>>> and clean.
>>>
>>>
>>>
>>> Bill Coleman
>>>
>>> Entrada, Erie, PA
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Something is preventing the free flow of water from one of the tanks.
>>> It could be;
>>>
>>>  - a clog in the hose from the tank to the tee,
>>>
>>>  - maybe a valve, somewhere in that line that is closed,
>>>
>>>  - it could be the vent is plugged solid, creating a vacuum.  Which does
>>> not allow the water to flow.
>>>
>>>
>>>
>>> Given that there is very little head pressure to overcome the vacuum, it
>>> wouldn't necessarily take too much of a plug on either side to stop the
>>> water flow.
>>>
>>>
>>>
>>> Danny
>>>
>>> -- Original Message --
>>> From: Rick Brass via CnC-List 
>>> To: "'Stus-List'" 
>>> Cc: Rick Brass 
>>> Subject: Stus-List Re: water tanks interconnected, or not?
>>> Date: Tue, 23 Mar 2021 23:37:40 -0400
>>>
>>> My 38 also has a tank under the port and starboard settees. Each of the
>>> tanks has a shutoff valve at the outlet. The two drain hoses meet at a T
>>> under the floorboards, and from this T is the line to the pressure pump.
>>>
>>>
>>>
>>> Curiously, there is also a shutoff valve on each side of the T. I could
>>> see no good purpose for the second shutoff in each supply line (unless it
>>> was there to stop all the water from leaking out through a broken line), so
>>> I left them in place when I replaced the hoses a while back.
>>>
>>>
>>>
>>> Maybe you have an arrangement like this one?
>>>
>>>
>>>
>>> Rick Brass
>>>
>>> Washington, NC
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> *From:* Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com]
>>> *Sent:* Monday, March 22, 2021 7:14 AM
>>> *To:* Stus-List 
>>> *Cc:* petemcm...@gmail.com; Adam Hayden 
>>> *Subject:* Stus-List Re: water tanks interconnected, or not?
>>>
>>>
>>>
>>> Peter
>>>
>>> Very interesting.  I have the same issue except my port tank drains and
>>> the Starboard tank does not.
>>>
>>> Drives me crazy.
>>>
>>> Adam c 36
>>>
>>> Sent from my Bell Samsung device ove

Stus-List Re: water tanks interconnected, or not?

[Don Marlin via CnC-List]

We use this on our 40.
The 40 has dual 30G water tanks.
https://tankedge.com/products.html

I also use it on my holding tank.
All the tanks are the original Poly.

Been installed for 2 years, I like it.
Works fine and did not break the bank.


On Wed, Mar 31, 2021 at 11:38 AM Peter McMinn via CnC-List <
cnc-list@cnc-list.com> wrote:

> Thanks for the ideas. I used my dinghy foot pump to blow out the vent on
> the port tank, which resulted in increased flow from that tank. I think I
> need to replace the senders in both tanks to get accurate readings on tank
> levels. Neighbor on the dock suggests a Tank Tender. Any suggestions?
>
> Peter McMinn
>
>  _/)
>
>
>
> On Wed, Mar 24, 2021 at 6:32 AM Bill Coleman via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> This sounds likely – My usual fix for fixing the prime in the water pump
>> in the spring was to bring a hose on board and blast water into the tank
>> drain, up to the faucet – this would also blast over to the other tank, and
>> likely blow out whatever crud was in the line. Then vacuum out that tank
>> and clean.
>>
>>
>>
>> Bill Coleman
>>
>> Entrada, Erie, PA
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Something is preventing the free flow of water from one of the tanks.  It
>> could be;
>>
>>  - a clog in the hose from the tank to the tee,
>>
>>  - maybe a valve, somewhere in that line that is closed,
>>
>>  - it could be the vent is plugged solid, creating a vacuum.  Which does
>> not allow the water to flow.
>>
>>
>>
>> Given that there is very little head pressure to overcome the vacuum, it
>> wouldn't necessarily take too much of a plug on either side to stop the
>> water flow.
>>
>>
>>
>> Danny
>>
>> -- Original Message --
>> From: Rick Brass via CnC-List 
>> To: "'Stus-List'" 
>> Cc: Rick Brass 
>> Subject: Stus-List Re: water tanks interconnected, or not?
>> Date: Tue, 23 Mar 2021 23:37:40 -0400
>>
>> My 38 also has a tank under the port and starboard settees. Each of the
>> tanks has a shutoff valve at the outlet. The two drain hoses meet at a T
>> under the floorboards, and from this T is the line to the pressure pump.
>>
>>
>>
>> Curiously, there is also a shutoff valve on each side of the T. I could
>> see no good purpose for the second shutoff in each supply line (unless it
>> was there to stop all the water from leaking out through a broken line), so
>> I left them in place when I replaced the hoses a while back.
>>
>>
>>
>> Maybe you have an arrangement like this one?
>>
>>
>>
>> Rick Brass
>>
>> Washington, NC
>>
>>
>>
>>
>>
>>
>>
>> *From:* Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com]
>> *Sent:* Monday, March 22, 2021 7:14 AM
>> *To:* Stus-List 
>> *Cc:* petemcm...@gmail.com; Adam Hayden 
>> *Subject:* Stus-List Re: water tanks interconnected, or not?
>>
>>
>>
>> Peter
>>
>> Very interesting.  I have the same issue except my port tank drains and
>> the Starboard tank does not.
>>
>> Drives me crazy.
>>
>> Adam c 36
>>
>> Sent from my Bell Samsung device over Canada’s largest network.
>>
>>
>> --
>>
>> *From:* Peter McMinn via CnC-List 
>> *Sent:* Monday, March 22, 2021 3:55:08 AM
>> *To:* cnc-list@cnc-list.com 
>> *Cc:* petemcm...@gmail.com 
>> *Subject:* Stus-List water tanks interconnected, or not?
>>
>>
>>
>> I have a 30gal water tank under both settees. The valves for each are set
>> to open flow. However, the pump seems to draw only from the starboard side.
>> I’d assumed that with both valves open, the tanks would equalize, but the
>> stbd tank empties and the pump goes dry, while the port tank remains full.
>> Can someone venture to what’s going on? I’ve read this 2015 discussion
>> <https://cnc-list.com/empathy/thread/2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR?hash=SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F#SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F>,
>> but the OP then was interested in disconnecting the two tanks. I’ll do some
>> exploring tomorrow to see what might be preventing the tanks from
>> equalizing. Ideas are welcome.
>> Thanks to all of the subscribers that contributed to the list to help
>> with the costs involved.  If you want to show your support to the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>> Thanks - Stu
>
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Peter McMinn via CnC-List]

Thanks for the ideas. I used my dinghy foot pump to blow out the vent on
the port tank, which resulted in increased flow from that tank. I think I
need to replace the senders in both tanks to get accurate readings on tank
levels. Neighbor on the dock suggests a Tank Tender. Any suggestions?

Peter McMinn

 _/)



On Wed, Mar 24, 2021 at 6:32 AM Bill Coleman via CnC-List <
cnc-list@cnc-list.com> wrote:

> This sounds likely – My usual fix for fixing the prime in the water pump
> in the spring was to bring a hose on board and blast water into the tank
> drain, up to the faucet – this would also blast over to the other tank, and
> likely blow out whatever crud was in the line. Then vacuum out that tank
> and clean.
>
>
>
> Bill Coleman
>
> Entrada, Erie, PA
>
>
>
>
>
>
>
>
>
> Something is preventing the free flow of water from one of the tanks.  It
> could be;
>
>  - a clog in the hose from the tank to the tee,
>
>  - maybe a valve, somewhere in that line that is closed,
>
>  - it could be the vent is plugged solid, creating a vacuum.  Which does
> not allow the water to flow.
>
>
>
> Given that there is very little head pressure to overcome the vacuum, it
> wouldn't necessarily take too much of a plug on either side to stop the
> water flow.
>
>
>
> Danny
>
> ---------- Original Message --
> From: Rick Brass via CnC-List 
> To: "'Stus-List'" 
> Cc: Rick Brass 
> Subject: Stus-List Re: water tanks interconnected, or not?
> Date: Tue, 23 Mar 2021 23:37:40 -0400
>
> My 38 also has a tank under the port and starboard settees. Each of the
> tanks has a shutoff valve at the outlet. The two drain hoses meet at a T
> under the floorboards, and from this T is the line to the pressure pump.
>
>
>
> Curiously, there is also a shutoff valve on each side of the T. I could
> see no good purpose for the second shutoff in each supply line (unless it
> was there to stop all the water from leaking out through a broken line), so
> I left them in place when I replaced the hoses a while back.
>
>
>
> Maybe you have an arrangement like this one?
>
>
>
> Rick Brass
>
> Washington, NC
>
>
>
>
>
>
>
> *From:* Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com]
> *Sent:* Monday, March 22, 2021 7:14 AM
> *To:* Stus-List 
> *Cc:* petemcm...@gmail.com; Adam Hayden 
> *Subject:* Stus-List Re: water tanks interconnected, or not?
>
>
>
> Peter
>
> Very interesting.  I have the same issue except my port tank drains and
> the Starboard tank does not.
>
> Drives me crazy.
>
> Adam c 36
>
> Sent from my Bell Samsung device over Canada’s largest network.
>
>
> --
>
> *From:* Peter McMinn via CnC-List 
> *Sent:* Monday, March 22, 2021 3:55:08 AM
> *To:* cnc-list@cnc-list.com 
> *Cc:* petemcm...@gmail.com 
> *Subject:* Stus-List water tanks interconnected, or not?
>
>
>
> I have a 30gal water tank under both settees. The valves for each are set
> to open flow. However, the pump seems to draw only from the starboard side.
> I’d assumed that with both valves open, the tanks would equalize, but the
> stbd tank empties and the pump goes dry, while the port tank remains full.
> Can someone venture to what’s going on? I’ve read this 2015 discussion
> <https://cnc-list.com/empathy/thread/2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR?hash=SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F#SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F>,
> but the OP then was interested in disconnecting the two tanks. I’ll do some
> exploring tomorrow to see what might be preventing the tanks from
> equalizing. Ideas are welcome.
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Bill Coleman via CnC-List]

This sounds likely - My usual fix for fixing the prime in the water pump in
the spring was to bring a hose on board and blast water into the tank drain,
up to the faucet - this would also blast over to the other tank, and likely
blow out whatever crud was in the line. Then vacuum out that tank and clean.

 

Bill Coleman

Entrada, Erie, PA

 

 

 

 

Something is preventing the free flow of water from one of the tanks.  It
could be;

 - a clog in the hose from the tank to the tee,

 - maybe a valve, somewhere in that line that is closed,

 - it could be the vent is plugged solid, creating a vacuum.  Which does not
allow the water to flow.

 

Given that there is very little head pressure to overcome the vacuum, it
wouldn't necessarily take too much of a plug on either side to stop the
water flow.

 

Danny

-- Original Message --
From: Rick Brass via CnC-List 
To: "'Stus-List'" 
Cc: Rick Brass 
Subject: Stus-List Re: water tanks interconnected, or not?
Date: Tue, 23 Mar 2021 23:37:40 -0400

My 38 also has a tank under the port and starboard settees. Each of the
tanks has a shutoff valve at the outlet. The two drain hoses meet at a T
under the floorboards, and from this T is the line to the pressure pump.

 

Curiously, there is also a shutoff valve on each side of the T. I could see
no good purpose for the second shutoff in each supply line (unless it was
there to stop all the water from leaking out through a broken line), so I
left them in place when I replaced the hoses a while back.

 

Maybe you have an arrangement like this one?

 

Rick Brass

Washington, NC

 

 

 

From: Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com] 
Sent: Monday, March 22, 2021 7:14 AM
To: Stus-List 
Cc: petemcm...@gmail.com; Adam Hayden 
Subject: Stus-List Re: water tanks interconnected, or not?

 

Peter

Very interesting.  I have the same issue except my port tank drains and the
Starboard tank does not.

Drives me crazy.  

Adam c 36

Sent from my Bell Samsung device over Canada's largest network.

 

  _  

From: Peter McMinn via CnC-List 
Sent: Monday, March 22, 2021 3:55:08 AM
To: cnc-list@cnc-list.com 
Cc: petemcm...@gmail.com 
Subject: Stus-List water tanks interconnected, or not?

 

I have a 30gal water tank under both settees. The valves for each are set to
open flow. However, the pump seems to draw only from the starboard side. I'd
assumed that with both valves open, the tanks would equalize, but the stbd
tank empties and the pump goes dry, while the port tank remains full. Can
someone venture to what's going on? I've read this 2015 discussion
<https://cnc-list.com/empathy/thread/2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR?hash=S
LQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F#SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F> , but the
OP then was interested in disconnecting the two tanks. I'll do some
exploring tomorrow to see what might be preventing the tanks from
equalizing. Ideas are welcome.

Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Danny Haughey via CnC-List]

Hi Peter, Something is preventing the free flow of water from one of the tanks. 
 It could be; - a clog in the hose from the tank to the tee, - maybe a valve, 
somewhere in that line that is closed, - it could be the vent is plugged solid, 
creating a vacuum.  Which does not allow the water to flow. Given that there is 
very little head pressure to overcome the vacuum, it wouldn't necessarily take 
too much of a plug on either side to stop the water flow. Danny

-- Original Message --
From: Rick Brass via CnC-List 
To: "'Stus-List'" 
Cc: Rick Brass 
Subject: Stus-List Re: water tanks interconnected, or not?
Date: Tue, 23 Mar 2021 23:37:40 -0400


My 38 also has a tank under the port and starboard settees. Each of the tanks 
has a shutoff valve at the outlet. The two drain hoses meet at a T under the 
floorboards, and from this T is the line to the pressure pump.
 
Curiously, there is also a shutoff valve on each side of the T. I could see no 
good purpose for the second shutoff in each supply line (unless it was there to 
stop all the water from leaking out through a broken line), so I left them in 
place when I replaced the hoses a while back.
 
Maybe you have an arrangement like this one?
 
Rick Brass
Washington, NC
 
 
 
From: Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com] 
Sent: Monday, March 22, 2021 7:14 AM
To: Stus-List 
Cc: petemcm...@gmail.com; Adam Hayden 
Subject: Stus-List Re: water tanks interconnected, or not?
 
Peter
Very interesting.  I have the same issue except my port tank drains and the 
Starboard tank does not.
Drives me crazy.  
Adam c 36
Sent from my Bell Samsung device over Canadas largest network.
 
From: Peter McMinn via CnC-List 
Sent: Monday, March 22, 2021 3:55:08 AM
To: cnc-list@cnc-list.com 
Cc: petemcm...@gmail.com 
Subject: Stus-List water tanks interconnected, or not?
 
I have a 30gal water tank under both settees. The valves for each are set to 
open flow. However, the pump seems to draw only from the starboard side. 
Id assumed that with both valves open, the tanks would equalize, but the 
stbd tank empties and the pump goes dry, while the port tank remains full. Can 
someone venture to whats going on? Ive read this 2015 discussion, 
but the OP then was interested in disconnecting the two tanks. Ill do 
some exploring tomorrow to see what might be preventing the tanks from 
equalizing. Ideas are welcome.
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Rick Brass via CnC-List]

My 38 also has a tank under the port and starboard settees. Each of the
tanks has a shutoff valve at the outlet. The two drain hoses meet at a T
under the floorboards, and from this T is the line to the pressure pump.

 

Curiously, there is also a shutoff valve on each side of the T. I could see
no good purpose for the second shutoff in each supply line (unless it was
there to stop all the water from leaking out through a broken line), so I
left them in place when I replaced the hoses a while back.

 

Maybe you have an arrangement like this one?

 

Rick Brass

Washington, NC

 

 

 

From: Adam Hayden via CnC-List [mailto:cnc-list@cnc-list.com] 
Sent: Monday, March 22, 2021 7:14 AM
To: Stus-List 
Cc: petemcm...@gmail.com; Adam Hayden 
Subject: Stus-List Re: water tanks interconnected, or not?

 

Peter

Very interesting.  I have the same issue except my port tank drains and the
Starboard tank does not.

Drives me crazy.  

Adam c 36

Sent from my Bell Samsung device over Canada's largest network.

 

  _  

From: Peter McMinn via CnC-List mailto:cnc-list@cnc-list.com> >
Sent: Monday, March 22, 2021 3:55:08 AM
To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>
mailto:cnc-list@cnc-list.com> >
Cc: petemcm...@gmail.com <mailto:petemcm...@gmail.com>
mailto:petemcm...@gmail.com> >
Subject: Stus-List water tanks interconnected, or not? 

 

I have a 30gal water tank under both settees. The valves for each are set to
open flow. However, the pump seems to draw only from the starboard side. I'd
assumed that with both valves open, the tanks would equalize, but the stbd
tank empties and the pump goes dry, while the port tank remains full. Can
someone venture to what's going on? I've read this 2015 discussion
<https://cnc-list.com/empathy/thread/2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR?hash=S
LQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F#SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F> , but the
OP then was interested in disconnecting the two tanks. I'll do some
exploring tomorrow to see what might be preventing the tanks from
equalizing. Ideas are welcome.

Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Peter McMinn via CnC-List]

Thanks for the replies. I looked under the floorboards today for a manifold or 
something regulating flow from/to either tank. Plumbing is all tight but only T 
connectors, no valve. I opened P/S tubes and both showed positive flow, though 
port side seemed slower. I then went to the port tank and and found a cracked 
tightener on the filler tube, which I sealed with rescue tape. Not sure that 
would be a factor in the issue. Joe, I do suspect a venting issue and will try 
to hunt that down tomorrow;)
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[pete.shelquist--- via CnC-List]

Pete –

Another suggestion is to use a small air compressor or shopvac to blow air 
through the lines to determine if/where the blockage is.  Do you have the small 
plastic gate valves at the tank?  Those may be suspect.   A ball valve is a 
nice upgrade.   Also as you go through the system, if you have any loose 
fittings air will get sucked in and cause problems too.  

 

Pumps will pull water from the side of least resistance.  If the line to your 
port tank is longer of has an obstruction, the starboard tank gets drawn down 
until the pump sucks air, then nothing is going to happen.  

 

FWIW – In normal use I isolate the tanks with the valves at the tank discharge 
and only use one at a time.   Yes the boat will be heavy on one side, but in 
this mode I’m not racing and don’t care.  When racing all tanks are empty.  

 

Hope that helps.

 

 

 

From: Joel Aronson via CnC-List  
Sent: Monday, March 22, 2021 8:56 AM
To: Stus-List 
Cc: Joel Aronson 
Subject: Stus-List Re: water tanks interconnected, or not?

 

Is there a valve manifold somewhere between the line and the pump?

Have you tried closing the starboard valve or blowing through the port hose to 
see what happens?

 

Should not be hard to troubleshoot if you know where the lines run.

 

On Mon, Mar 22, 2021 at 2:55 AM Peter McMinn via CnC-List 
mailto:cnc-list@cnc-list.com> > wrote:

I have a 30gal water tank under both settees. The valves for each are set to 
open flow. However, the pump seems to draw only from the starboard side. I’d 
assumed that with both valves open, the tanks would equalize, but the stbd tank 
empties and the pump goes dry, while the port tank remains full. Can someone 
venture to what’s going on? I’ve read this 2015 discussion 
<https://cnc-list.com/empathy/thread/2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR?hash=SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F#SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F>
 , but the OP then was interested in disconnecting the two tanks. I’ll do some 
exploring tomorrow to see what might be preventing the tanks from equalizing. 
Ideas are welcome.

Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu




 

-- 

Joel 

Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[dwight veinot via CnC-List]

Do the tanks each have vents to air

On Mon, Mar 22, 2021 at 8:14 AM Adam Hayden via CnC-List <
cnc-list@cnc-list.com> wrote:

> Peter
>
> Very interesting.  I have the same issue except my port tank drains and
> the Starboard tank does not.
>
> Drives me crazy.
>
> Adam c 36
>
> Sent from my Bell Samsung device over Canada’s largest network.
>
> --
> *From:* Peter McMinn via CnC-List 
> *Sent:* Monday, March 22, 2021 3:55:08 AM
> *To:* cnc-list@cnc-list.com 
> *Cc:* petemcm...@gmail.com 
> *Subject:* Stus-List water tanks interconnected, or not?
>
>
> I have a 30gal water tank under both settees. The valves for each are set
> to open flow. However, the pump seems to draw only from the starboard side.
> I’d assumed that with both valves open, the tanks would equalize, but the
> stbd tank empties and the pump goes dry, while the port tank remains full.
> Can someone venture to what’s going on? I’ve read this 2015 discussion
> ,
> but the OP then was interested in disconnecting the two tanks. I’ll do some
> exploring tomorrow to see what might be preventing the tanks from
> equalizing. Ideas are welcome.
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu

-- 
Sent from Gmail Mobile
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Joel Aronson via CnC-List]

Is there a valve manifold somewhere between the line and the pump?
Have you tried closing the starboard valve or blowing through the port hose
to see what happens?

Should not be hard to troubleshoot if you know where the lines run.

On Mon, Mar 22, 2021 at 2:55 AM Peter McMinn via CnC-List <
cnc-list@cnc-list.com> wrote:

> I have a 30gal water tank under both settees. The valves for each are set
> to open flow. However, the pump seems to draw only from the starboard side.
> I’d assumed that with both valves open, the tanks would equalize, but the
> stbd tank empties and the pump goes dry, while the port tank remains full.
> Can someone venture to what’s going on? I’ve read this 2015 discussion
> ,
> but the OP then was interested in disconnecting the two tanks. I’ll do some
> exploring tomorrow to see what might be preventing the tanks from
> equalizing. Ideas are welcome.
> Thanks to all of the subscribers that contributed to the list to help with
> the costs involved.  If you want to show your support to the list - use
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks
> - Stu



-- 
Joel
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Neil Andersen via CnC-List]

3-way valve in line somewhere?

Neil Andersen
20691 Jamieson Rd
Rock Hall, MD 21661
484-354-8800

From: Adam Hayden via CnC-List 
Sent: Monday, March 22, 2021 7:14:06 AM
To: Stus-List 
Cc: petemcm...@gmail.com ; Adam Hayden 

Subject: Stus-List Re: water tanks interconnected, or not?

Peter

Very interesting.  I have the same issue except my port tank drains and the 
Starboard tank does not.

Drives me crazy.

Adam c 36

Sent from my Bell Samsung device over Canada’s largest network.


From: Peter McMinn via CnC-List 
Sent: Monday, March 22, 2021 3:55:08 AM
To: cnc-list@cnc-list.com 
Cc: petemcm...@gmail.com 
Subject: Stus-List water tanks interconnected, or not?


I have a 30gal water tank under both settees. The valves for each are set to 
open flow. However, the pump seems to draw only from the starboard side. I’d 
assumed that with both valves open, the tanks would equalize, but the stbd tank 
empties and the pump goes dry, while the port tank remains full. Can someone 
venture to what’s going on? I’ve read this 2015 
discussion<https://cnc-list.com/empathy/thread/2KB2NSDGELMQQJSRMPPWPHVMCWQJ2ICR?hash=SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F#SLQZNGDWP5TUBYWW6HFGKHJT5DVCWB5F>,
 but the OP then was interested in disconnecting the two tanks. I’ll do some 
exploring tomorrow to see what might be preventing the tanks from equalizing. 
Ideas are welcome.
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

Stus-List Re: water tanks interconnected, or not?

[Adam Hayden via CnC-List]

Peter

Very interesting.  I have the same issue except my port tank drains and the 
Starboard tank does not.

Drives me crazy.

Adam c 36

Sent from my Bell Samsung device over Canada’s largest network.


From: Peter McMinn via CnC-List 
Sent: Monday, March 22, 2021 3:55:08 AM
To: cnc-list@cnc-list.com 
Cc: petemcm...@gmail.com 
Subject: Stus-List water tanks interconnected, or not?


I have a 30gal water tank under both settees. The valves for each are set to 
open flow. However, the pump seems to draw only from the starboard side. I’d 
assumed that with both valves open, the tanks would equalize, but the stbd tank 
empties and the pump goes dry, while the port tank remains full. Can someone 
venture to what’s going on? I’ve read this 2015 
discussion,
 but the OP then was interested in disconnecting the two tanks. I’ll do some 
exploring tomorrow to see what might be preventing the tanks from equalizing. 
Ideas are welcome.
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu