Pressure Reducer question

Discussion in 'Irrigation' started by rockee, Jul 7, 2008.

  1. rockee

    rockee LawnSite Member
    Posts: 41

    I had plumber install backflow preventer outside and when water pressure was measured it was 85. He suggested putting in a pressure reducer inside after where water line splits for sprinkler system. Reduce can be adjusted to 25-75 psi. Was this a mistake? should I have stayed with 85 and pressure drop would come down when got to heads? Since I'm putting in many feet of drip, I assumed that a pressure reducer was a good idea. I shaving this large one in-line better than the smaller ones at the zones?
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,041

    You don't need a pressure reducer. 85 psi won't damage anything, and a PRV can screw up your system performance, since it has a pressure loss above and beyond what it takes away when the pressure reduction happens. For the drip zone, you can install an inline regulator, in combination with the strainer the drip zone usually gets.
     
  3. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    Ditto city..We kill for that kind of pressure.
     
  4. CAPT Stream Rotar

    CAPT Stream Rotar LawnSite Fanatic
    Posts: 5,968

    ummmm85 psi..
     
  5. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    Truck with the big boys.
     
  6. rockee

    rockee LawnSite Member
    Posts: 41

    Oh, well. Did I make a mistake? Should I take it out? It is a somewhat expensive valve.
     
  7. BrandonV

    BrandonV LawnSite Platinum Member
    Posts: 4,262

    i'd take it out, when I install a well powered system we shoot for 70 psi, that's where all the magic happens.
     
  8. rockee

    rockee LawnSite Member
    Posts: 41

    My main is 1" from the inside to the outside. With that size pipe, I still don't need pressure reducer?

    Wondering if plumber took advantage or really thought I needed to reduce pressure.
     
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    Netafim is good to 60psi, I've proved it . Magic works at 70 to 80 psi.
     
  10. Waterit

    Waterit LawnSite Silver Member
    Posts: 2,913

    You got gotten.
     

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