Don’t forget that, along with your pump(s) churn, the high water level in the
tank must be used to determine maximum downstream system pressure.
Sent from my iPhone
> On May 7, 2021, at 4:06 PM, Mark.Phelps via Sprinklerforum
> wrote:
>
> So, if this same tank and pump were at the same elev
So, if this same tank and pump were at the same elevation and 5 blocks away
in a Water Utility Yard owned by the city water department, what pressure and
flow rate would one use to design a sprinkler system?
Mark at Aero
602 820-7894
-Original Message-
From: Sprinklerforum On Behalf
That's kind of the crux of my issue. For the new system, demand x duration
probably uses about half of the tank. But since the tank is sized for site fire
flow (hydrants... I assume, at least) then do I have to consider that demand as
part of what depletes the tank? Or is that completely separat
If you didn't have a pump at all and put the same tank 100' above ground, you'd
calculate to the minimum anticipated water level after demand x duration is
subtracted from the fill turn on point would you not? What would make this any
different? Genuine question, I've always used minimum water
Lots of items to think about. I always recommend using the tank at the
lowest available level.
- What is the level of the tank before refilled?
- Is the tank being utilized for any other purposes.
Reminder - account for the friction loss between the tank and the suction
side of the fire p
😀
On Fri, May 7, 2021 at 11:23 AM Michael Hill via Sprinklerforum <
sprinklerforum@lists.firesprinkler.org> wrote:
> There goes my logic, right out the window..again.
>
> Mike Hill
>
> -Original Message-
> From: Sprinklerforum On
> Behalf Of Bob Caputo via Sprinklerforum
> Sent: Frid
There goes my logic, right out the window..again.
Mike Hill
-Original Message-
From: Sprinklerforum On Behalf
Of Bob Caputo via Sprinklerforum
Sent: Friday, May 7, 2021 2:21 PM
To: sprinklerforum@lists.firesprinkler.org
Cc: Bob Caputo
Subject: Re: Available Pressure from Fire Water
No, you are not permitted to use elevation pressure from a gravity tank.
You do not know the elevation of the water in the tank which is depleted
during the operation of the systems in fighting the fire. You are
permitted to use the pumps productive curve at 150% of rated flow and 65%
of rated pre
I would think you could subtract the sprinkler demand x required duration from
the lowest expected capacity of the tank and use the height of the remaining
water column as your supply. The tank would also probably need an automatic
fill. I have no codes to back this up, but logic says it should
I'm working on a project where they are adding a new building to an existing
campus. There is an existing fire water storage tank and fire pump that serves
the site underground fire loop. The new building has a very demanding sprinkler
system that just barely exceeds the fire pump's pressure av
Thanks all…The civil thought he had this covered with the idea of adding a
second valve, but no dice with the water supplier!
David Toshio Williams, PE*, FPE
(*Registered in MN, WI, MI, IA, IL, IN, ND, VT)
(218) 279-2436 direct | (218) 310-2446 cell
LHB, Inc. | PERFORMANCE DRIVEN DESIGN
From: K
Not having ever been on any committee making up any rules regarding this
I'm going to take some logic shots at the issue as to the whys. If the
hydrant is along a right of way then the service valve will be in the
street somewhere perpendicular to the direction of the street in a straight
line from
NFPA 24 - 2019
7.1.1.2.2 Valves required by 7.1.1.2 shall be installed within
20 ft (6.1 m) of the hydrant.
7.1.1.2.2.1 Valves shall be clearly identified and kept free of
obstructions.
7.1.1.2.3 Where valves cannot be located in accordance with
7.1.1.2.2, valve locations shall be permitted w
A civil engineer friend of mine is working on a state project in California and
there is a fight between the water purveyor and the state fire marshal as to
the location of the hydrant valves. The water purveyor wants the valves to be
right off the main and does not feel a need to keep the valve
Tim
I would recommend you get a completed Owner's Information Certificate
for your files.
Dick
-Original Message-
From: Sprinklerforum On Behalf
Of tstone52--- via Sprinklerforum
Sent: Thursday, May 06, 2021 1:38 PM
To: sprinklerforum@lists.firesprinkler
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