B
Bob La Londe
Since water expands and contracts and there is a check valve or anti
backflow valve how is that pressure relieved
backflow valve how is that pressure relieved
nick markowitz said:All new sprinkler systems have a backflow prevention valve older systems
had check valve
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?
I have been on inspections where
the water comes out pitch black and has a real fowl odor.
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.
come in and help detoriate the plumbing...
[sigh]
well that what's the sprinkler guys I know told me..
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.
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.
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.
piping or convert to a dry system, if corrosion is an issue.
Jim, are you saying that the water actually smelled like chickens? ;-)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
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.
fire sprinkler systems in residential and certain other low hazard occupancies