11
votes
Water shut off valve and backflow preventer
You want the green valve for normal water shutoff purposes
If you're just seeking to shut off the household (domestic) water to work on the plumbing, you want the green valve, since that will shut off ...
- 81.7k
5
votes
Water shut off valve and backflow preventer
Never heard of a "Potter switch" but I would guess you have a fire sprinkler system, given the "before the meter" and red paint. Also the much larger diameter line for that purpose ...
- 201k
4
votes
Can I seal a crack in a Zurn Wilkins 375 RP backflow preventer?
I would not expect success attempting to glue or seal that. Apart from the general difficulty of "plastic of unknown type" repair, it's usually the case that when a plastic item cracks one ...
- 201k
4
votes
Do individual irrigation system branch pipes need backflow preventers?
The instructions probably state the need for backflow prevention assuming there is none existing. ( probably legally motivated)
If you have backflow prevention on the main line to the system manifold ...
- 25.1k
2
votes
Accepted
Remove leaky backflow preventer
When removing threaded plumbing you need to use two wrenches.
One to hold and one to turn.
Place the holding wrench as close to the wall as you can to prevent pipe bending.
If you have to, remove the ...
- 16.9k
1
vote
Why is my lawn sprinkler backflow preventer failing?
It sounds like you have a blockage in that zone and the water is dispersed through the backflow.
Try taking the heads off at the beginning of the zone. Also look for damp ground where a brake may ...
- 25.1k
1
vote
Accepted
Do I need a backflow preventer before my yard hydrant
The catalog and product sheet don't mention backflow, and I assume that's a feature they would want to highlight. The same company also sells backflow prevention devices so its something they know ...
- 27.7k
1
vote
Accepted
Can I eliminate irrigation vacuum breaker after installing upstream RPZ?
Certainly
The NJ Plumbing Code (based on the IAPMO UPC) expressly permits the use of RPZs for protecting irrigation systems in 10.5.10, and I cannot find language in the code that'd prohibit the use ...
- 81.7k
1
vote
Backflow preventer spewing water
Your RPZ needs servicing
That sort of continuous spitting or streaming from a Reduced Pressure Principle/Zone (RPP or RPZ) assembly with nothing going on downstream is a sign that the assembly needs ...
- 81.7k
1
vote
Why is my sprinkler system backflow leaking after being winterized?
Obviously, your main sprinkler shutoff valve in the basement is leaking allowing water to leak into the vacuum breaker and out through the bell cap on the the backflow preventer.
You will need to ...
- 8,752
1
vote
Why is my sprinkler system backflow leaking after being winterized?
Your main shut-off is leaking ( not shown ) into the system. Until it completely stops water flow ,leave the red hose bibb open to prevent water from going into the rest of the sprinkler system. I ...
- 8,271
1
vote
I know there is a pressure vacuum breaker here, but what is the rest?
In my area, it is common for PVB to break if incorrectly winterized, but local water code requires these to be installed and inspected annually, with an inspection report filed with the city water ...
- 4,389
1
vote
Is a back flow valve needed to attach a washing machine?
One way to accomplish this is; You can add one Inline spring check valve to each supply line.
After the check valves you can tee the hot and cold together with one 1/2" copper pipe out into a 1/4 ...
- 13.5k
1
vote
Accepted
How to connect to black underground sprinker pipe
The black sprinkler pipe is probably HDPE and not PVC so you need a different connection method than with PVC.
Your best bet is to check with a local sprinkler supply company that can give you the ...
- 23.1k
1
vote
Is my irrigation system winterized properly?
The ONLY way to ensure that there is no water trapped in low spots in a sprinkler system is to BLOW it out with compressed air. Until that is done, there is almost certainly some amount of water ...
- 23.1k
1
vote
Can this water valve be replaced as a separate component?
That's just a basic quarter-turn ball valve that's been tossed in there for shutoff purposes
The cracked part isn't part of the backflow preventer proper; it's simply a quarter-turn ball valve that's ...
- 81.7k
1
vote
How to prevent the washing machine outlet from backflowing to other devices
If these appliances are supposed to drain into a standpipe, then they need to be connected in a way that allows them to drain in open air.
Get a double wye, of the appropriate size to fit on the ...
- 131k
1
vote
Why did my febco backflow preventer fail?
The only way that could happen is if the nut was loose and then pressurized. Those BFPs are serviceable and the nut must have been left loose. If you can find the components from under the bell you ...
- 6,314
1
vote
Sprinkler System Low Pressure
The size and configuration of the entire piping system that supplies your irrigation setup, from point of entry to your property (usually the water meter) all the way to each sprinkler head, along ...
- 35.1k
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