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The last 10 posts

Monday, July 9th 2012, 2:53am

by Wet_Boots

you own the PRV - replace it

Sunday, July 8th 2012, 4:40pm

by FrostyKev

Yep, that was the one with the brand new valve diapragm. For kicks, and mainly to see if I could cap the existing pop ups, I pulled one of them off and ran it. There was no noise, obviously that wouldn't work, but free flowing there was no thumping.

There is one more valve that I didn't know about, a pressure reduction device after the water meter. I picked up a water pressure gauge, our water pressure read 100-110 PSI. 8| ?( :cursing:

So, went to adjust that, and guess what, it won't change, won't adjust up or down. I adjusted the main line shutoff before the water meter and pressure reducer, pressure is still 110 PSI but the thumping is gone from all systems (for now)

I'm not sure if I own the pressure reduction device or if Denver water does. When I figure that out I'll be fixing/replacing it or having Denver Water help out with that. . . Then I will re-open the main line shutoff back to wide open, and see if it is the pressure reduction device.

With the main shutoff partially closed the pressure is still high (110) the flow rate seems adequate, no pulsating pop ups and they are watering correctly.

More to come, and hopefully this will be solved! :thumbup:

Sunday, July 8th 2012, 2:16pm

by Wet_Boots

we hope you also replaced the valve diaphragm

Sunday, July 8th 2012, 11:31am

by FrostyKev

Replaced one of the troubled zone valves (100DV) with a bonnet from a 100DVF. I turned down the flow until it didn't thump. One of the heads now only sends water 1', the rest are not even covering 1/2 what they did before and leaving a lot of lawn without water. Another oddity, some of the heads were "jumping" up and down, or pulsating up and down.

When the system is thumping, most of the "noise" appears to be coming on the copper side, I barely feel any pulse/thud on the valve, but the backflow looks like it will come off the house! (little exaggeration, but there is vibration)

I think the other suggestion was a leak in the line. I'm guessing I can shut off each sprinkler head then see if I can feel the water running through the valve? Is that the best way to see if there is a leak? Any other ideas?

Wednesday, July 4th 2012, 11:15am

by hi.todd

I will keep a watch on this one. I want to see how it turns out.

Good Luck :thumbsup:

Wednesday, July 4th 2012, 9:00am

by FrostyKev

I take it the bonnets are interchangeable so I don't have to fully replace the valve, just remove the screws, disconnect the solenoid, and replace.

Wednesday, July 4th 2012, 8:27am

by Wet_Boots

Of course they make one - it's the 100DVF

Tuesday, July 3rd 2012, 11:11pm

by FrostyKev

I guess there could be a leak somewhere. . .

The Rainbird valves are 100DV, I can't seem to spot a flow control bonnet for that model, any idea if they make one or another would work?

Tuesday, July 3rd 2012, 3:23pm

by Wet_Boots

You have to reduce zone flow. Almost nothing else will do. Change nozzles. Change heads. Install a flow-control bonnet on the zone valve.

Or maybe find a leak and fix it.

Tuesday, July 3rd 2012, 2:07pm

by FrostyKev

Since I have 2 types of valves (thanks to the builder installing the front and contractor the back) I replaced one of the thumper valve diaphragms (rainbird) and that did not solve that zone's problems. There was nothing wrong with the old one that I could tell, but the new one did NOT solve the thumps.

Could the backflow be causing the thumps? It has a small crack and needs to be replaced anyway, just working up the nerve to give that a shot.