Will decraesing hose size increase velocity at the sprinkler head?

Discussion in 'Irrigation' started by 4 seasons lawn&land, Jul 17, 2011.

  1. 4 seasons lawn&land

    4 seasons lawn&land LawnSite Gold Member
    from NY
    Posts: 3,594

    Or is it dependent on the flow rate of the sprinkler head??
     
  2. HokieAg07

    HokieAg07 LawnSite Senior Member
    Posts: 352

    Yes decreasing pipe size increases fluid velocity
     
  3. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,314

    Make the pipe something like 1/8-inch diameter and the water goes supersonic :p
     
  4. If you have a sprinkler head that puts out 4gpm and a 3/4" hose that supplies 4gpm then decreasing the hose size to 1/2" isn't going to increase the sprinkler velocity.

    If you want max pressure at the sprinkler then minimizing pressure loss by enlarging the hose supplying the water is the way to go. Not the reverse.
     
  5. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,314

    thank you mister science
     
  6. 4 seasons lawn&land

    4 seasons lawn&land LawnSite Gold Member
    from NY
    Posts: 3,594


    Now that will only work if the water supply puts out enough pressure right?

    If Im dealing with pathetic water pressure I assume downsizing the hose and using the same sprinker will help but just take longer to water. Is this right?
     
  7. Sprinkus

    Sprinkus LawnSite Silver Member
    Posts: 2,099

    Yes, it isn't.
     
  8. 4 seasons lawn&land

    4 seasons lawn&land LawnSite Gold Member
    from NY
    Posts: 3,594

    lol. Okay so 3/4 inch hose is always better no matter what. So what about the big 1" industrial hose? With 1" impact sprinklers. Would that be a good all around set up for new lawn installs?
     
  9. How will shrinking the pipe size increase pressure at the head? The only option you have under the circumstance you describe is the put in a smaller nozzle and minimize pressure loss by overdosing the pipe.
    Posted via Mobile Device
     
  10. 4 seasons lawn&land

    4 seasons lawn&land LawnSite Gold Member
    from NY
    Posts: 3,594

    holy **** I dont get it. So whats a nice hose & impact head set up for new lawn installs?
     

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