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Wilkins 975XL backflow problem

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justgeorge

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Discussion starter · #1 ·
I've got a customer with a leaking Wilkins 975 XL 3/4" backflow. It is a fairly steady trickle out the dump port on the bottom. I looked at it yesterday (had told him to turn it off at the front-end shut off valve). I turned it back on, and sure enough it's leaking. I turned it off, a bunch of water dumped out all at once, I turned it back on and now no leak. Hooray I fixed it. I ran one zone for a very short period, turn it off, still no leak so I left. This morning the customer called me; his system ran thru the full cycle early this morning, and the steady trickle is back.

I've searched the web and can't find any 'exploded parts drawings". Any thoughts besides calling a plumber or replacing it?

Thanks,
George
 
#3 ·
That is a Reduced Pressure Backflow, take the tops off and see if one of the checks has a bad seal or a object is obstructing the seal. I have seen rocks, nuts and solder in the seals.
 
#5 ·
As londonrain said or a bad #2 Check. It being a 3/4 size, its not worth spending to much time on trying to repair it especially if your not that familiar with an RPZ and cannot test it to be sure that its purpose even works properly. Change out the whole valve
 
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Discussion starter · #12 ·
SprinklerGuy said:
IN WA:
Glue #1 culprit....or teflon tape/paste.....or galvanized rust particles...;)
Click to expand...
well I opened it up and found a nice collection of what appeared to be reddish sand - would that be galvanized rust particles? The house is pretty new though, I wouldn't think it would have galvanized pipe anywhere. City water supply, not a well.

George
 
#16 ·
Replace it and get out of there! :walking:

I don't know what your labor rate is but the client would have started to lose money after the first tear-down with us.
 
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#17 ·
I've had 2 Febco 825Y RPs this week that were brand new and leaking. One just needed the screw in the relief valve tightened up. The thing was about to come apart. And the other we could never get to stop so it was replaced with a brand new one again. Probably a defect we couldn't see.
 
#19 ·
Wet_Boots said:
I had a few 825Y's drip from the relief valve, due to the relief assembly O-ring being defective.
Click to expand...
People need to really lighten up on always blaming O-rings for everything. Sheesh... The way people talk about them you'd think they'd make a space shuttle crash or something. :p
 
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