Low PSI

Discussion in 'Irrigation' started by MANICURED LAWNS, Jun 5, 2007.

  1. MANICURED LAWNS

    MANICURED LAWNS LawnSite Member
    Posts: 70

    Recommendation for home with 30 psi static water pressure. Very small yard mostly driveways
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,035

    What's the water supply pipe size? I would guess your best bet would be drip tubing, if it's a really small yard.
     
  3. MANICURED LAWNS

    MANICURED LAWNS LawnSite Member
    Posts: 70

    its about 25X25 with a U shaped drive way and small strips of grass else where with a decent sized back yard. Sprays or rotors?
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,035

    Neither, unless you have a booster pump, and you shouldn't have a booster pump, unless you know your supply can give you more water than the booster can pump. (it's a water-safety issue)
     
  5. HooKooDooKu

    HooKooDooKu LawnSite Member
    Posts: 70

    What about MP Rotators? Their web site provides performance numbers down to 25psi. I realize it will be pushing the limits, but if you use 1" pipe and keep flow rates low (and if you don't have to use an RPZ).
     
  6. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    Edgy...@ 30psi I'd hate to think what operating pressure is @ even 3 or 4 gpm!:cry:
     
  7. unit28

    unit28 LawnSite Bronze Member
    Posts: 1,554

    use all copper laterals.
     
  8. unit28

    unit28 LawnSite Bronze Member
    Posts: 1,554

    but seriously

    Like they say....low pressure equals additional zones.
    The[turn your head leary] mp's are a great bet on this project.

    You do not need 10 heads per zone.
     
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    Bak to plumbing school bub....the friction loss would kill you unless you have
    some of Jon's magic pipe...even if you do....have you priced copper lately!
     
  10. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    I like MPs. they are a poor man's Stream-Rotor. But 30 psi is getting down
    there even if you have zero friction loss, which is impossible. He did not say
    if a gpm test was taken, but......shiver.
     

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