Short Cycling Well Pump

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by Craig Sprinkle, May 5, 2018.

  1. Craig Sprinkle

    Craig Sprinkle New Member

    Joined:
    May 5, 2018
    Location:
    Portsmouth Virginia
    I have three different zones on my sprinkler system. Zone 1 is the only zone that my pump short cycles on, zones 2 & 3 the pump works fine.

    History, my system is three years old. Last year zone one did the SAME thing and it had a clogged or blocked diaphragm. I cleaned it and all was well. This year, short cycling again. I checked for blockage and all looked good. But the release valve would not tighten down. I replaced the ENTIRE top of the sprinkler valve (everything) and it still short cycles.

    Here is another puzzle piece: if I run the outside faucet and zone 1 simultaneously the pump DOES NOT S/C!

    Please.

    Help meeeeeeee!
     
  2. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Your zone 1 does not use enough water. Use bigger sprinkler heads for less time.

    You don't define short cycling, and you don't say what the minimum pump run time is. You may also have a failing pressure tank that makes the condition worse.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. Craig Sprinkle

    Craig Sprinkle New Member

    Joined:
    May 5, 2018
    Location:
    Portsmouth Virginia
    Short Cycling: pump runs for less than a second and cuts off about 3 seconds and repeats. I discovered the old tank was water logged and replaced it was a new tank set at 48 psi (30/50 pressure switch). I have the zones set at 15 minutes each which run consecutively. The heads for zones 2 & 3 are rotator heads while zone 1 has spray nozzles. Thanks.
     
  5. LLigetfa

    LLigetfa DIYer, not in the trades

    Joined:
    Feb 6, 2011
    Occupation:
    Retired
    Location:
    NW Ontario, Canada
    Too much precharge. Should be 28 PSI.
     
  6. Craig Sprinkle

    Craig Sprinkle New Member

    Joined:
    May 5, 2018
    Location:
    Portsmouth Virginia
    I lowered the pressure to 28. Nope, still short cycling on z1, and z2 & 3 work fine. Thanks you though!
     
  7. valveman

    valveman Cary Austin Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    You must have a very small tank? To stop cycling every zone has to put out as much as the pump can supply, OR you need a Cycle Stop Valve to eliminate cycling no matter how small the zones are.
     
    Craig Sprinkle likes this.
  8. Craig Sprinkle

    Craig Sprinkle New Member

    Joined:
    May 5, 2018
    Location:
    Portsmouth Virginia
    Very informative. Thank you very much. By the way, it’s a 2 gallon tank.
     
  9. valveman

    valveman Cary Austin Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    A 2 gallon size tank only holds 1/2 gallon of water. You REALLY need a CSV.
     
  10. Craig Sprinkle

    Craig Sprinkle New Member

    Joined:
    May 5, 2018
    Location:
    Portsmouth Virginia
    So, there shouldn’t be any issues going from a 3/4” output to the 1.25” CSV back down to 3/4” ?
     
  11. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Adapting up and down is OK.

    If using the adjustable CSV1A https://cyclestopvalves.com/pages/csv1a-specifications , it also has 1 inch FIP threads. You would be better screwing into the 1 inch female threads in that case.

    The CSV125 has lower pressure drop below the pressure setpoint. It is not adjustable.
     
    valveman and Craig Sprinkle like this.
  12. Craig Sprinkle

    Craig Sprinkle New Member

    Joined:
    May 5, 2018
    Location:
    Portsmouth Virginia
    Ok, thanks a lot.
     
  13. Craig Sprinkle

    Craig Sprinkle New Member

    Joined:
    May 5, 2018
    Location:
    Portsmouth Virginia
    The issue has been resolved! Thanks for suggesting the CSV !
     
    valveman likes this.
Similar Threads: Short Cycling
Forum Title Date
Pumps and Tanks Well Forum & Blog. Water is life. Submersible well pump short cycling Sep 8, 2018
Pumps and Tanks Well Forum & Blog. Water is life. The effects of short cycling Jun 10, 2017
Pumps and Tanks Well Forum & Blog. Water is life. Zoeller sump pump short cycling Apr 29, 2017
Pumps and Tanks Well Forum & Blog. Water is life. Short cycling issue. Unsure if system is even set up correctly! Feb 4, 2017
Pumps and Tanks Well Forum & Blog. Water is life. Pump is short cycling, not sure wha to do Jan 12, 2017

Share This Page