Slow pressure increase

Discussion in 'Irrigation / Sprinkler Forum' started by tbris, Jun 28, 2009.

  1. tbris

    tbris New Member

    Messages:
    5
    Each of my six zones works at approximately 75% pressure for the first 5-8 minutes, then eventually ramps up to the usual area coverage. Never did this before. I read an earlier post about low pressure in one zone and the recommended fix was either a new solenoid or diaphragm. I'm wondering if that could be the issue for me as well.
    I have a Watermaster 57223 auto valve model. 3/4". Due to placement, I'd hate to have to replace the entire sprinkler valve.
  2. upper

    upper DIY Senior Member

    Messages:
    154
    Location:
    Fresno, CA
    City water or your well?....Upper
  3. tbris

    tbris New Member

    Messages:
    5
    City water. System is at least 5 years old. I have been using it problem free for 3 years.
  4. upper

    upper DIY Senior Member

    Messages:
    154
    Location:
    Fresno, CA
    So if you took 2 or 3 garden hoses and turned them on,the would not fluctuate greatly? Second all zones do this equally?Thirdly when a zone comes on and is lacking,go and manuallly turn the solin. lefty lucy and see if this helps...Upper
  5. tbris

    tbris New Member

    Messages:
    5
    The hoses would not fluctuate greatly...pressure is solid at my house.
    All zones do this equally. There are 6 zones total.
    I haven't fiddled with the solenoids yet. It seems odd that all six would need a tweaking.
    I tried turning lefty lucy and saw no noticeable benefit.

    Thanks for taking the time to help.
    Last edited: Jun 28, 2009
  6. BRD

    BRD New Member

    Messages:
    53
    Location:
    northeast
    Seems to me that if you're having the problem in each of the 6 zones that the problem is between your water source and the valve manifold. Very doubtful that the problem is in all the individual zone valves. Do you by chance have a master valve in the system? I would track your plumbing back to your water source tie in point. What kind of backflow device do you have? Is there a pressure regulator in the system? These are some of the things you need to check. Especially since it is a city water system, it should be easier to track down.
Similar Threads: Slow pressure
Forum Title Date
Irrigation / Sprinkler Forum PVB leaking slowly May 25, 2010
Irrigation / Sprinkler Forum Severe water hammer/slow close valves Jul 12, 2005
Irrigation / Sprinkler Forum Questions about Pressure Vacuum Breaker Aug 7, 2014
Irrigation / Sprinkler Forum 5 zone system: one zone has low pressure/spray.. Jun 14, 2014
Irrigation / Sprinkler Forum pressure regulator reducer failure Apr 20, 2014

Share This Page