Valve question

Discussion in 'Irrigation' started by Mikol, May 26, 2008.

  1. Mikol

    Mikol LawnSite Member
    Messages: 51

    When I have one of my zones running I noticed I have low Pressure.while I was walking around I heard a noise coming from my valve box.while the zone was running I open the bleeder valve and the zone had total pressure and working fine.after I shut down the zone and restarted a zone test went back to low pressure .it seems to me that maybe the valve is sticking or can anyone give me some expert advice.
  2. CAPT Stream Rotar

    CAPT Stream Rotar LawnSite Fanatic
    Messages: 6,202

    did you take the valve apart or check your voltage out put?

    how about the resistance of the particular valve?

    Messages: 18,668

    Sounds like you have a richdel/hardie/irritrol 205. Take a pic and post. We'll advise on servicing it.
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,762

    1) defective diaphragm assembly
    2) blockage in the solenoid pathway
  5. londonrain

    londonrain LawnSite Silver Member
    Messages: 2,129

    Sounds like the diaphragm has lost its ability to flex and fully open...diaphragm needs replacing back with the type and model of the valve...
  6. DanaMac

    DanaMac LawnSite Fanatic
    Messages: 13,226

    Bingo! My thought exactly. Most likely the diaphragm.
  7. EagleLandscape

    EagleLandscape LawnSite Platinum Member
    Male, from Garland, Texas
    Messages: 4,350

    is the flow control turned way down? if it's not a bad diaphragm, thats what it sounds like. open it all the way up.
  8. Dirty Water

    Dirty Water LawnSite Fanatic
    Messages: 6,794

    If my memory serves me right, and it depends on the valve, but I'm pretty sure that if you crank down the flow control, even the bleeder won't open it.
  9. EagleLandscape

    EagleLandscape LawnSite Platinum Member
    Male, from Garland, Texas
    Messages: 4,350

    true true.....

    but hissing will come from a turned down flow on a valve, thats where i pulled that from

    Messages: 18,668

    Only other valve I think it could be is a HR series valve and that would follow Boots solenoid restriction problem. If it is the 205 we generally just gut the valve and replace with all new parts. Bonnet/diaphragm/solenoid.

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