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OT Plumbers or Irrigation guys - question
Posted on 7/18/16 at 8:51 am
Posted on 7/18/16 at 8:51 am
In process of fixing my sprinkler system which started leaking after a hard freeze last winter. I bought a few internal parts for the backflow preventer thinking that would be it but still leaks. I'm buying a whole new BFP and my question is: Can I just cut the pvc just as it enters the old BFP and then install new one to those pipes or should I run new pvc all the way down to the water source? They've been down in the ground many years and Id rather not start digging up shite I don't have to.
TIA
TIA
3
Posted on 7/18/16 at 8:54 am to The Mick
just cut the pvc as needed. No need to run new pvc unless you have a pipe leak.
Posted on 7/18/16 at 8:55 am to The Mick
Depends on whether the freeze caused other sections of the PVC pipe to crack. Are you sure that is the only source of the leak is the part you are replacing? If so, then cut the pipes and reinstall new PVC with the new component.
Posted on 7/18/16 at 8:57 am to The Mick
What c dog said and if you have a leak just keep digging and cutting
Good rule is drain blow out your sprinkler by Halloween
Good rule is drain blow out your sprinkler by Halloween
Posted on 7/18/16 at 8:59 am to Cdawg
I don't think there's any leak in the pvc anywhere. Thanks
Posted on 7/18/16 at 9:01 am to uptownsage
If I cut the pvc and reinstall the bfp will be a little shorter/lower to the ground is that an issue?
quote:Thx cracker. Like a fool Ive never drained it, ever.
Good rule is drain blow out your sprinkler by Halloween
This post was edited on 7/18/16 at 9:06 am
Posted on 7/18/16 at 9:05 am to The Mick
quote:
If I cut the pvc and reinstall the bfp will be a little shorter/lower to the ground is that an issue?
Shouldn't be. You could always go buy a coupler and a stick of pipe and adjust to the correct height.
Posted on 7/18/16 at 9:08 am to ThatMakesSense
quote:Is there a recommended height it should be?
Shouldn't be. You could always go buy a coupler and a stick of pipe and adjust to the correct height.
Posted on 7/18/16 at 9:14 am to The Mick
Not really on a residential system. Just gauge it on being screened or ease of access. something like that. Watts may say in their manual though. Some municipalities may have something but rarely enforced.
This post was edited on 7/18/16 at 9:17 am
Posted on 7/18/16 at 9:15 am to The Mick
make sure after installation of the new BFP that you are at least 12" above the highest sprinkler head
Posted on 7/18/16 at 9:19 am to The Mick
quote:
Thx cracker. Like a fool Ive never drained it, ever.
If you're in south Lousiana, you only need to worry about it in those deep freezes. I never drain mine but make sure it's insulated/covered during the hard freezes.
Posted on 7/18/16 at 9:27 am to Cdawg
quote:
Not really on a residential system. Just gauge it on being screened or ease of access. something like that. Watts may say in their manual though. Some municipalities may have something but rarely enforced.
the BFP you are using is a vacuumm breaker type anti-siphon back flow.
It needs to be installed 12" above the highest fixture to work properly. It works by having a pressure differential between the incoming water pressure and leaving water pressure.
when the sprinkler shut off, the vacuum breaker will dump a little bet of water to make to lower the pressure on the leaving side of the backflow preventor. Where is the water leaking from? the top of the backflow assembly could be as simple as a piece of trash in the backflow that is preventing the vacuum breaker from fully closing.
Posted on 7/18/16 at 9:36 am to tigeraddict
You are correct, but I'm assuming(which I shouldn't) he's in Louisiana where it's mostly flat. The backflow is going to be higher than the heads at a min to even install it on a residential.
Posted on 7/18/16 at 9:43 am to tigeraddict
Thanks all of you
Posted on 7/18/16 at 9:59 am to Cdawg
Check local requirements, you may have to be a licensed plumber to replace one of these. Not sure if rules have changed, but even licensed irrigation installers (yeah, thanks La) can't legally install them.
It is the only line of protection when dealing with residential systems and drinking water systems.
Also, it is likely a cracked housing. Happens all the time. Buy the whole BFP and hopefully your irrigation installer used unions for the upper for easy replacement
It is the only line of protection when dealing with residential systems and drinking water systems.
Also, it is likely a cracked housing. Happens all the time. Buy the whole BFP and hopefully your irrigation installer used unions for the upper for easy replacement
This post was edited on 7/18/16 at 10:02 am
Posted on 7/18/16 at 10:10 am to fightin tigers
quote:What is unions for the upper mean?
hopefully your irrigation installer used unions for the upper for easy replacement
Posted on 7/18/16 at 10:15 am to The Mick
The union on the bottom right. It allows you to replace everything above ground without digging anything up. Break the union, disassemble, reassemble
Posted on 7/18/16 at 10:21 am to fightin tigers
quote:This has more metal/steel than mine. Mine has vertical pvc pipes instead of the steel ones in your pic. My plan was to cut the old pvc and remove the old bfp completely. Then install new bfp to the existing pvc with couplers and small pieces of new pvc to get it back to the height and position it's in now.
The union on the bottom right. It allows you to replace everything above ground without digging anything up. Break the union, disassemble, reassemble
Posted on 7/18/16 at 10:23 am to The Mick
Yep. That works just as well.
Posted on 7/18/16 at 10:23 am to The Mick
some cities require a copper connection instead of pvc.
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