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Welcome to the neighborhood. Your friendly HOA would like to wish you would fix the crappy lawn the former owners left behind. Now you’ve got to repair the sprinklers, but just how big a job is it? The Forum has some good news for you and for your neighbors. (Also, thank you for marking the pipe where the water is gushing out, in case we missed it.)
Original Post: Broken Valve body on Pressure Vacuum Breaker
I'm new to this forum, but not forums in general. I feel like I've done my due diligence in searching the forum before posting this.
My girlfriend and I just bought our first house and our HOA has sent us a welcome letter with a warning about our crappy lawn... It wasn't very welcoming. As such, I decided to get the sprinkler system going tonight. After turning on the water at the valve in the crawlspace, I went to the Pressure Vacuum Breaker to turn the water on there. Forgive my misuse or ignorance to sprinkler system terminology if I use the wrong words. Anyway... I opened the valve on the house-side of the PVB. It leaks a little, but nothing a little plumbing tape wouldn't fix (correct me if I'm wrong). Next I opened the valve on the sprinkler/yard-side of the PVB and I got a lot of spraying from a crack in the body of the valve. In the images below, the crack is outlined by a red rectangle. The PVB itself appears to not have any problems though.
Obviously I need to replace that valve/valve-body, but I'm wondering if I can replace JUST that or do I need to buy an entire PVB assembly, valves and all?
Highlights from the Thread
Pilot Dane Group Moderator
If everything else is working and not leaking I would just replace the one cracked valve. I'm sure the next question will be "how do I unscrew it?" I guess they assembled the threaded fittings then glued the assembly onto the PVC pipes coming up from the ground. You can cut both PVC pipes (make sure the main water is turned off), replace the bad valve then reconnect the PVC with glued couplings or union fittings.
Name of that valve/valve-body?
Hi Pilot Dane,
Thanks for confirming that I can just replace that valve instead of the entire PVB. Since I'm not up on the terminology, what is that valve called (if it has a specific name)? I'd like to order one online, but I can't seem to figure out what it's called.
Pilot Dane Group Moderator
They are 1/4 turn ball valves or just "ball valve." Yours have female NPT on both ends. On the bottom side there is a male NPT to PVC slip fitting. On the top of the valve there is a pipe nipple connecting it to the backflow preventer.
When you unscrew the broken valve you've got a 50/50 chance that the pipe nipple will stay in the valve or the backflow preventer. If it comes out with the valve it will be difficult to remove without messing up the threads so I'd just buy another one (pipe nipple). They are usually less than a dollar.
Thanks Pilot Dane. I was able to replace it without any issues. I appreciate your assistance with all this.
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