# Rainbird asv inops.

Discussion in 'Irrigation' started by jcom, May 9, 2007.

1. ### jcomLawnSite Senior Memberfrom Bismarck, NDMessages: 791

We have run into two customers with Rainbird 1" anti-siphon valves that were not blown out last fall. Now some of them are bypassing a small amount of water.

Not being that familiar with these ASV valves, I am looking for some info. Are these valves when damaged able to allow small flows through them? Not either on or off. These are homeowner installed with new homeowners now that are completely in the dark as to sprinkler systems.

Do you repair these valves or just throw them away? Easy to convert to regular valves with a PVB backflow.

Thanks for the help.

John

4. ### jcomLawnSite Senior Memberfrom Bismarck, NDMessages: 791

The valves are leaking out to the heads. I have virtually no experience with these valves so will go pick a couple up
and take them apart .

Thanks for all the help.

John

5. ### PurpHazeLawnSite Fanaticfrom Visalia, CAMessages: 5,496

Are they manual or automatic ASVs?

6. ### jcomLawnSite Senior Memberfrom Bismarck, NDMessages: 791

RBird automatic valves.

7. ### PurpHazeLawnSite Fanaticfrom Visalia, CAMessages: 5,496

"Weeping" is a classic symptom of diaphraghm/diaphragm seat problems. Otherwords... the diaphragm may not be totally sealing off. Might be warped, cracked, debris, etc. It's like a leaking faucet. Changing the diaphragms will prolly stop the weeping. If it doesn't you may have a seating problem and it will depend if the diaphragm seat is replaceable. You might be money ahead to just change the whole valve out if you suspect any freezing damage.

8. ### jcomLawnSite Senior Memberfrom Bismarck, NDMessages: 791

This system was not winterized last year. Sorry about that omission as well.

I had another repair job today that had two of the same valves doing the same thing. I will start stocking several of the repair kits for these valves.

Thanks again,

John

9. ### PurpHazeLawnSite Fanaticfrom Visalia, CAMessages: 5,496

Just out of curiousity... in your cold climate area what type of piping are the ASVs installed onto?

10. ### Wet_BootsLawnSite Fanaticfrom metro NYCMessages: 48,765

Maybe better to just replace all the valves in one shot, based on T&M costs for messing around with freeze-damaged valves.