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The last 10 posts

Wednesday, June 27th 2012, 10:49am

by Wet_Boots

If the RPZ spits water and then stops releasing water, it is not malfunctioning.

Wednesday, June 27th 2012, 9:00am

by longdrive03

Took that sucker apart last night and cleaned, inspected and did everything I knew how to do. Installed it and it held tight until I turned off the sprinkler then it dumped again but not as heavy. Looks like I will get new one. Saw them online for $192.00 so that should fix the problem and free up my time . Thanks for your help WB.

Tuesday, June 26th 2012, 7:07pm

by longdrive03

Installed the relief valve seat last night but no change. I believe there is a check valve in line before the rpz. I will open it tonight and see how it looks. I will probably take everything apart and clean and reinstall and see how that works. Any tips appreciated.

Monday, June 25th 2012, 2:15pm

by Wet_Boots

the gel (food-grade silicone grease) is needed on the O-ring involved in the moving parts of the relief assembly, and not so much anywhere else

Monday, June 25th 2012, 1:39pm

by longdrive03

Thanks. I will probably get the relief valve seat replacement today and install it since it's the only new part not installed. I also didn't lubricate the o-rings with the supplied gel (intructions don't mention it) and I'll do that.

I replaced the check seat valve orings with round o-rings from Home Depot. Do I need to get different o-rings from my supplier? Thanks again.

Burning up in Arkansas.

Monday, June 25th 2012, 1:16pm

by Wet_Boots

I had a few RPZs prone to pulsing, on high-pressure supplies, and it was essential to crack open the top-mounted testcocks to bleed the air out (these were all Febco 825Y) - it's still okay for an RPZ to spit some water when a zone shuts off hard.

Monday, June 25th 2012, 1:02pm

by longdrive03

Thanks WB. Is there a link on this forum for flushing air out of system? So I would have two check valves upstream before 975? Is there a sequence to open/shut the valves to avoid discharge. I really appreciate your help. thanks

Monday, June 25th 2012, 11:58am

by Wet_Boots

Make sure all the air is out of the device. A last-ditch attempt to stop a pulsating discharge is a check valve added upstream of the RPZ

Monday, June 25th 2012, 10:34am

by longdrive03


Hi guys, just joined. My 975xl froze winter before last and I replaced the first check valve section. Had a few discharges last summer but my sprinkler guy reworked the 975 and everthing was good. This spring the relief valve discharges came back. I just installed a repair kit and two new check valve seats (one had a 1" chip off the rim). Still have the same discharge when sprinklers not on (nothing when they are). Discharge is pulsing at first then gotes to steady. What else could I do besides buying new unit? Thanks for any suggestions.

Thursday, May 24th 2012, 8:14am

by GatorGuy

My general rule is that if any part of a backflow is damaged by freezing I replace the whole thing. There could be hidden damage that will show up later. Then the customer is upset with my work and expect me to warrant the parts I didn't replace because I said they were good.

It would cost you more to have a professional diagnose each part than to do a simple replacement.

You didn't include pictures. In many cases the homeowner can do their own replacement. It's not that hard.
Then have it tested.