Check valve

Discussion in 'Irrigation' started by jbailey52, Sep 21, 2013.

  1. jbailey52

    jbailey52 LawnSite Bronze Member
    Posts: 1,057

    Hey guys,
    I have a customer who has a system installed on a hill. The bottom pgp rotors weep when off ... It's not leaking through the valve, just the lines themselves. I know some heads have check valves installed already but what are my options with this?
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  2. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,603

    You should be able to get Hunter LDCs for the PGPs, they are cheap, and that would be my first suggestion. If the drop is too much, you might have to consider Hunter "lipstick" LDCs.
     
  3. jbailey52

    jbailey52 LawnSite Bronze Member
    Posts: 1,057

    Thanks. Are they referred to as something else? I can find any product info.
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  4. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,603

    Sorry, they are called a "low-drain-check valve.". As I recall, they were just a rubber gasket and keeper.
     
  5. zman9119

    zman9119 LawnSite Senior Member
    Posts: 743

  6. cjohn2000

    cjohn2000 LawnSite Senior Member
    Posts: 552

    You should be able to buy the check valves that go in the bottom of the head. Theyre just a filter with a circular piece of rubber and a toothed clip to hold it in place. I believe the add in check valve is good up to 10' of elevation change. Anything more and your probably going to have to go the HCV route.
     
  7. grassman177

    grassman177 LawnSite Fanatic
    Posts: 9,795

    i started to use the built in check valves in the heads as options. really like it, of course under 10ft. never looked into more elevation drop check valves. ishould
     
  8. cjohn2000

    cjohn2000 LawnSite Senior Member
    Posts: 552

    I always liked Hunters add on CV's. I understand that there is a heavier spring in the SAM heads. Even Hunter's rotor CV works across more than one head. Alot less to stock.
     
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,603

    Me too, especially since I used so many Toro "Stream-Rotors".With a large-bladed screwdriver, they can be adjusted for drop, but care must be taken to not over-tighten them, as friction loss will kill you.
     
  10. cjohn2000

    cjohn2000 LawnSite Senior Member
    Posts: 552

    I saw a thread in check valve for a 570 popup, same vintage as the four screw nozzle in it. The check valve looked like it had to be inserted into the body from the top and installed with a socket.
     

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