High PSI

Discussion in 'Irrigation' started by socalkol, Oct 15, 2013.

  1. socalkol

    socalkol LawnSite Member
    Messages: 63

    Bought a house lastyear (brand new) and two weeks ago I had a blowout/explosion right before one of the zone valves for my sprinkler system.

    I patched this up and fixed it, but then tested the pressure afterwards to see the original designer sent 200+ psi to my irrigation system which i imagined caused that issue as well as others.

    What is the safe/ideal PSI should i have going to the irrigation system for individual zones of 4 RAINBIRD 5000 rotors shooting 25 ft radius each
  2. RhettMan

    RhettMan LawnSite Silver Member
    from Texas
    Messages: 2,629

    thats really high PSI I think
  3. socalkol

    socalkol LawnSite Member
    Messages: 63

    Right, i gathered that also and imagine thats what caused my problem originally... Now I am just looking to findout what PSI I should have, so i know what to set the PRV to when i install it this week.
  4. RhettMan

    RhettMan LawnSite Silver Member
    from Texas
    Messages: 2,629

    i am also interested in learning the answer to this....

    do you have the system design on hand ?
  5. CAPT Stream Rotar

    CAPT Stream Rotar LawnSite Fanatic
    Messages: 6,201

    Around here we notice pgp's start to have a short life span after 40-50 psi.

    Thats at the head pressure... put in a PSI regulator try to keep it under 50 hopefully it doesn't take away from head performance.

    My suggestion would be to keep it under 50...

    good luck.
  6. DanaMac

    DanaMac LawnSite Fanatic
    Messages: 13,226

    I prefer to see 60 psi static, but I don't get nervous until it gets over 75 psi. I think the highest we have seen on a residential is 175.
  7. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,335

    Depends on what your potential pressure losses are downstream of the valves, but for your typical residential lot 50-60 PSI coming into the valves should be more than sufficient.
  8. socalkol

    socalkol LawnSite Member
    Messages: 63

    Thanks everyone for your help!
  9. stebs

    stebs LawnSite Senior Member
    Messages: 499

    wheres the 200+ psi coming from? Hard to imagine a city would be running that high of pressure in their mains... In my city we see about 70, if the city tries to go over that, they start blowing mains out of the ground...
  10. 1idejim

    1idejim LawnSite Fanatic
    Messages: 11,358

    I would guess that 50-100 psi would be average across the country, I'm with stebbs and wonder if the op's psi is correct
    Posted via Mobile Device

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