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Sprinklers - Pressure relief

B

Bob La Londe

Since water expands and contracts and there is a check valve or anti
backflow valve how is that pressure relieved
 
N

nick markowitz

All new sprinkler systems have a backflow prevention valve older systems had
check valve
 
B

Bob La Londe

nick markowitz said:
All new sprinkler systems have a backflow prevention valve older systems
had check valve

Ok, but how is the pressure relieved in a sprinkler system from the
expansion and contraction of the water trapped in the system?


 
P

pulic emeny

Bob La Londe said:
Ok, but how is the pressure relieved in a sprinkler system from the
expansion and contraction of the water trapped in the system?

don't know about sprinklers but my hot water heater has an air tank.:)
 
F

Frank Olson

Jim Rojas wrote:

I have been on inspections where
the water comes out pitch black and has a real fowl odor.

So how much do you charge Robert for inspecting his sprinkler?
 
P

Petem

Jim Rojas said:
It is a good idea to leave the inspectors test valve open for a couple of
minutes, or until the water turns clear. I have been on inspections where
the water comes out pitch black and has a real fowl odor.

Here the common practice is to leave the maximum of old water in the
system,to prevent new water full of oxygen to come in and help detoriate the
plumbing....

well that what's the sprinkler guys I know told me..
 
R

Robert L Bass

... prevent new water full of oxygen to
come in and help detoriate the plumbing...
[sigh]

well that what's the sprinkler guys I know told me..

They must have had a good laugh after they left.
 
P

Petem

Robert L Bass said:
... prevent new water full of oxygen to
come in and help detoriate the plumbing...
[sigh]

well that what's the sprinkler guys I know told me..

They must have had a good laugh after they left.


not as much as us,we will all have a good laugh......but not you....
 
P

Petem

well there a lot of sprinkler guys that talked about it,and not just to
me...so maybe...
 
J

Just Some Guy

I have personally seen corroded piping, especially in garage dry systems,
resulting in failures after just a couple of years. Apparently there are
some types of bacteria that accelerate the process. I think the comment
about the oxygen in the water has merit.

Read this link below for some enlightenment. There are many more such pages
out there if you search a little.

http://www.fpscmi.com/FAQs.htm



Mike (no, not THAT Mike)


Robert L Bass said:
... prevent new water full of oxygen to
come in and help detoriate the plumbing...
[sigh]

well that what's the sprinkler guys I know told me..

They must have had a good laugh after they left.
 
R

Robert L Bass

I have personally seen corroded piping,
especially in garage dry systems, resulting in failures after just a couple
of years. Apparently there are some
types of bacteria that accelerate the process. I think the comment about the oxygen in the water has merit.

*** Oh, yeah. Those iron-eating bacteria are a real problem. They eat up pipes in dry systems from the inside out. That's why
iron exposed to air rusts so much faster than iron submerged in water. Hahahahahahahahaha.
Read this link below for some enlightenment.

The referenced website is a rip-off.
There are many more such pages out there if you search a little.

*** Note to ASA morons: The first paragraph is sarcasm.
 
R

Robert L Bass

You might want to try PVC sprinkler
piping or convert to a dry system, if corrosion is an issue.

Hmm. I wonder if the local AHJ would
approve of PVC for fire suppression.
The stuff melts at a fairly low
temperature.

--

Regards,
Robert L Bass

=============================>
Bass Home Electronics
941-866-1100
4883 Fallcrest Circle
Sarasota · Florida · 34233
http://www.bassburglaralarms.com
=============================>
 
J

Jim

Sprinkler system pressure is usually regulated by street water pressure.
Since sprinkler systems are designed to handle the 3 times the highest
possible water pressure from the city water supply, you don't need to worry
about over pressure at all.

The check valves or backflow preventers are there to make sure the system
holds its highest possible street pressure at all times in case city water
supply falls low, due to drought, or high demands.

Since the check valves & backflow preventors prevent water from leaving the
system, often times the water gets stagnet, and gets heavy soot from oil &
mineral deposits. During an annual inspection, the inspectors test valve is
opened to simulate a head trigger. This should trigger the waterflow switch,
and generate an alarm, after 45 seconds.

It is a good idea to leave the inspectors test valve open for a couple of
minutes, or until the water turns clear. I have been on inspections where
the water comes out pitch black and has a real fowl odor.

Jim Rojas
Jim, are you saying that the water actually smelled like chickens? ;-)
 
D

Doug

Orange CPVC has long been used for fire sprinkler systems in residential and
certain other low hazard occupancies

Doug
 
C

Crash Gordon

Someone told me that if you put strawberry Jello in the pipes it will keep
them from corroding for over 138 years EDT.


|
| | > well there a lot of sprinkler guys that talked about it,and not just to
| > me...so maybe...
|
|
| I have a theory
|
| I believe somewhere somehow there is a large group of people who do
nothing
| but tell other people stupid things like this, nobody knows who they are,
| nobody can mention names, nobody can say what they look like because they
| are hand-picked to blend in.. They are just those "Someone once told
me...."
| guys with the only goal of passing out massive amounts of dis-information
|
| However in your case these people didn't fill your head with stupid things
| like this, instead you thought it up all by your demented self. In reality
| you don't know any sprinkler guys and you never had any conversation about
| 100 year old pipes, in reality you are just a common french idiot
|
|
|
|
|
| > "Jim Rojas" <[email protected]> a écrit dans le message de | > [email protected]...
| > > Sprinkler pipes should last 100+ years. I think he was pulling your
leg.
| > >
| > > Jim Rojas
| > >
| > >
| > > | > >>
| > >> "Jim Rojas" <[email protected]> a écrit dans le message de | > >> [email protected]...
| > >>> It is a good idea to leave the inspectors test valve open for a
couple
| > >>> of minutes, or until the water turns clear. I have been on
inspections
| > >>> where the water comes out pitch black and has a real fowl odor.
| > >>
| > >> Here the common practice is to leave the maximum of old water in the
| > >> system,to prevent new water full of oxygen to come in and help
| detoriate
| > >> the plumbing....
| > >>
| > >> well that what's the sprinkler guys I know told me..
| > >>
| > >>
| > >>
| > >
| > >
| >
| >
|
|
 
B

Bob La Londe

Crash Gordon said:
Someone told me that if you put strawberry Jello in the pipes it will keep
them from corroding for over 138 years EDT.

It has to be sugar free jello.
 
R

Robert L Bass

Orange CPVC has long been used for
fire sprinkler systems in residential and certain other low hazard occupancies

Interesting. I always assumed it had to be metal. I've seen copper pipes in residential sprinkler systems. Every commercial
system I worked with was iron pipe.

--

Regards,
Robert L Bass

=============================>
Bass Home Electronics
941-866-1100
4883 Fallcrest Circle
Sarasota · Florida · 34233
http://www.bassburglaralarms.com
=============================>
 
R

Robert L Bass

It has to be sugar free jello.

True. Sugar releases oxydants and you know what that can do to a pipe. If they uses PVC, you can substitute butterscotch pudding
(made with real milk, none of that soya stuff) for the jello.
 
C

Crash Gordon

Yep, that's all that's used in res. out these here parts.
I did run into a guy who did his own system in reg pipe though...but he
owned a sprinkler co.


| Orange CPVC has long been used for fire sprinkler systems in residential
and
| certain other low hazard occupancies
|
| Doug
|
| --
|
| | > Hmm. I wonder if the local AHJ would
| > approve of PVC for fire suppression.
| > The stuff melts at a fairly low
| > temperature.
| >
| > --
| >
| > Regards,
| > Robert L Bass
|
|
 
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