I was called to look a leaking riser. I got on the job site and found a
Tyco Model 513 Test and Drain with a pressure relief valve. I think the
pressure relief valve is leaking. The main drain outlet is wet and the
sight glass is obscured with rust. Their are a total of 5 wet risers, all
douglas hicks
if the riser feeds a gridded system, you should not remove the pressure
relief valve.
if there is a remote inspector´s test, it is possible to suck most of the
air out of the
system via this valve. If this is done on a cold day, and there are no
air pockets in
the pipe, then on
Thanks, we just wanted to show him the cut sheet on that one. We just
happened to be here doing repair at the same time he was around and he
questioned it. We just happened to be the lucky ones to be in the right
place at the right time!? It makes me wonder if the availability of a
sprinkler
Just replace it.
Forest Wilson
--Original Message--
From: douglas hicks
Sender: sprinklerforum-boun...@firesprinkler.org
To: sprinkler board
ReplyTo: sprinklerforum@firesprinkler.org
Subject: pressure relief valve
Sent: Jan 23, 2009 2:41 AM
I was called to look a leaking riser. I got
i learn more here than most seminars.
i welcome getting shot down here,
rather on submitted paper.
if my ideas get shot down, my reputation will get bruised.
i am not my ideas (buddhist kharma notwithstanding)
ideas need to make it on their own merit --
regardless of who says it.
so with
You can't just remove them - be serious.
If pressure is over the factory setting, then a REPLACEMENT of the 300#
adjustable model is available and you crank it down to 200 PSI and end the
drip.
glc
-Original Message-
From: sprinklerforum-boun...@firesprinkler.org
Gridded system?
From: douglas hicks fire...@eoni.com
To: sprinkler board sprinklerFORUM@firesprinkler.org
Sent: Friday, January 23, 2009 2:41:35 AM
Subject: pressure relief valve
I was called to look a leaking riser. I got on the job site and found a Tyco
Good morning George. The tag on the pressure relief valve says 175 PSI, I
only saw one part number on the Tyco site. The pressure valve did not look
adjustable.
Douglas Hicks
General Fire Equipment Co of Eastern Oregon, Inc
- Original Message -
From: George Church for...@ptd.net
To:
Pressure relief Valves are required on Gridded Pipe Systems only.
G. Tim Stone
NICET Level III Engineering Technician
Fire Protection Sprinkler Design
and Consulting Services
117 Old Stage Rd. - Essex Jct., VT. 05452
TEL: (802) 434-2968 Fax: (802) 434-4343
Not currently but maybe for 2010.
John
John August Denhardt, P.E.
Strickland Fire Protection Incorporated
5113 Berwyn Road
College Park, Maryland 20740
Office Telephone Number: 301-474-1136
Mobile Telephone Number: 301-343-1457
FIRE SPRINKLERS SAVE LIVES
-Original Message-
From:
You can replace with a watts PRV.
http://www.watts.com/pro/_productsFull_tree.asp?catId=64parCat=293pid=803ref=2
I put one on a system in my house and had to run it down pretty far to get it
to stop relieving at 140 lbs system pressure. The springs see to lose tension
over time.
We had a similar problem with an AGF test drain and learned that the 175 is
real accurate. It can start releasing pressure at around 155 to 190. We
replaced it with a 190 or 195 psi per their recommendation and the problem was
solved. I think they said the accuracy had to do with the spring
The cheap ones aren't adjustable, preset for about 175.
And on our high pressure storage jobs, with working pressure in the 165-185
PSI range, these would p all the time, so we use the 100-300 adjustable ones
and adjust them to 200 +/-.
If you're wondering why we're comfortable with up to 185,
I did a flow test a couple of days ago on an underground main that
had recently been looped. There is a main that feeds a hydrant and
sprinklers to the building at the end of the loop. I flowed the
hydrant and read the pressures off the first test port on the
backflow preventer (before any
I was taught that you had to flow past your gauge hydrant to get the
proper results so I would agree with the contractor. Your scenario is
like a dead end main with your gauge on the last hydrant if I am
interpreting it correctly.
-Original Message-
From:
The problem is that you have the loop, then the hydrant, then the
lead-in to the sprinkler system, then the end of the main. No other
realistic way to do it.
At 10:36 AM 1/23/2009, you wrote:
I was taught that you had to flow past your gauge hydrant to get the
proper results so I would agree
When working for a client with similar type of boat rack storage, we looked at
using High Expansion Foam when reviewing with the manufacturer of the foam
equipment and concentrate the manufacturers noted that high ex foam is not
listed for the protection of boats in racks. Same problem with
Todd,
Under those conditions you are justified to set up the way you described in
you earlier email.
I have had to set up gages inside existing building in the past. I believe
your reading will still
provide an accurate picture of the municipal system.
G. Tim Stone
NICET Level III Engineering
There are several items mentioned I'd likely to comment on.
1. As soon as someone shows me a hangar that stacks their planes in
racks, I'll consider it as a starting point.
2. Fire modeling is not a useful tool for defining SUPPRESSION criteria.
3. Many racks also provide the roof
the 2010 edition expanded this from just gridded systems to all wet-
pipe systems
Roland
On Jan 23, 2009, at 3:41 AM, å... wrote:
if the riser feeds a gridded system, you should not remove the
pressure
relief valve.
___
Sprinklerforum
Obviously having two hydrants does not prohibit running a flow test
accurately. What you did makes perfect sense and should give accurate flow
and pressure data.
Ask the contractor what he would do if he had a private tank, fire pump, a
single hydrant and the sprinklered building as an
last racked marina fire I heard about could be seen from 20 miles
away. Whrah
Roland
I would like to add to this.. Most of the pictures of the damage I found on
these were taken from the air. Some of the secondary effects were across
the bays, water not building type.
R/
Matt
Matthew J.
Todd,
I have never heard of testing this way, I have always used a minimum of two
hydrants. On a looped system if you have the manpower or water usage isn't
an issue use three hydrants taking the pressure readings from the middle
hydrant. Do you have access to NFPA 291, this has some good
Maybe I have Friday-it is, but what possible difference could it be to
reading pressure at a point whether your gauge is attached to a hydrant,
city side of a BFP as Todd did, or a hose bib on a house with another faucet
cracked open to prevent their BFP from being closed? Its accurate
measurement
George,
I thought that if you did not flow past your gauge hydrant that your
residual reading would be off. Have I been wrong all these years?
-Original Message-
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of George
Church
Watts 530-C is adjustable.
Thom McMahon, SET
Firetech, Inc.
2560 Copper Ridge Dr
P.O. Box 882136
Steamboat Springs, CO 80488
Tel: 970-879-7952
Fax: 970-879-7926
-Original Message-
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf
The best way I know of to accurately run this test is to flow a hyd. On one
side of the loop main to the sprinkler system and gauge another hyd. On the
other side of the sprinkler system conn. to the loop main.
_A___T___B__
Where A is the flow hyd.
Where B is
The message here is, DON'T GET TOO CLOSE!
Thom McMahon, SET
Firetech, Inc.
2560 Copper Ridge Dr
P.O. Box 882136
Steamboat Springs, CO 80488
Tel: 970-879-7952
Fax: 970-879-7926
-Original Message-
From: sprinklerforum-boun...@firesprinkler.org
You're not affected by the velocity pressure of the water going past your
hydrant, that'd introduce errors
-Original Message-
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Dewayne
Martinez
Sent: Friday, January 23, 2009 12:52
Per edition 5 of the American Mutual Insurance Alliance Simplified water
supply testing In testing a water system at a sprinklered plant, sometimes
we can note the residual pressure from a gauge at the base of the nearest
riser. This is not recommended as standard practice, but may be used when
Per edition 5 of the American Mutual Insurance Alliance Simplified water
supply testing In testing a water system at a sprinklered plant, sometimes
we can note the residual pressure from a gauge at the base of the nearest
riser. This is not recommended as standard practice, but may be used when
I'm with George on this one. The water doesn't care what piping
configuration is used to connect the static/residual gauge to the system -
be it a hydrant or a sprinkler riser. The 2nd hydrant is most common
because (normally) it's the most convenient. I've had to do exactly as you
described
When taking the static/residual reading from a sprinkler riser, I think the
effective point (the point the calcs should be taken back to) is the point
where the non-flowing water meets the flowing water. If the public water
main is looped, this would be where the sprinkler line ties into the
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