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would a 3/4 hose bring more flow

Discussion in 'Power Washing' started by bigw, Jan 21, 2008.

  1. bigw

    bigw LawnSite Bronze Member
    Posts: 1,540

    would a 3/4 hose bring more flow to the pressure washer from a house then a 5/8 hose would or does it depend on the amount of flow coming out of the actual spicket?Which size garden hose would be sufficient or should i say recommended for a 4gpm 4000 psi pressure washer.
  2. UtahGrassBust

    UtahGrassBust LawnSite Member
    Posts: 31

    just from what i've seen it depends on the pressure out of the house.

    where are you finding most of your work, no body pressure washes out here
  3. bigw

    bigw LawnSite Bronze Member
    Posts: 1,540

    Have not started pressure washing yet,but will this year.
  4. topsites

    topsites LawnSite Fanatic
    Posts: 21,653

    That's a tough question to answer, all depends on the gpm flow of the spiggot.
    One thing that might help is to find out what copper or pvc pipe is more often used, that would be the lines that bring water TO the spiggot in the first place, if all those are 5/8's...

    I do think thou, a 3/4 hose would open up one part of the equation, it MIGHT increase flow.
    I say might because now there's more water in the hose, hence the pressure has to overcome more inertia.
    It might do nothing...

    But don't pressure washers use less gpm than standard flow rates anyhow?
    I don't think it matters, honestly, I would be more for getting a quality grade than worrying about the 5/8 vs. 3/4th's, personally.
  5. LawnScapers of Dayton

    LawnScapers of Dayton LawnSite Silver Member
    Male, from Dayton, OH
    Posts: 2,574

    if the supply is large enough.....(ie: copper in the house) the 3/4 hose will drop the pressure at the end of the hose, and deliver more volume........but my guess is the supply from the house will not be enough to make a positive difference. In fact it may be worse if the supply from the house can't keep the the 3/4 full as the PW draws on it.......
  6. Happy Frog

    Happy Frog LawnSite Bronze Member
    Posts: 1,224

    I use a 5/8" hose and it works good with my 4.0 gal/min unit.
    Some houses just can't delivers the 4.0 gal/min and your hose won't make a difference. You'll need a float valve tank for these houses (35 gal works fine)

    FCPWLLC LawnSite Senior Member
    Posts: 352

    Go with the 3/4. It allows for more flow.
  8. bigw

    bigw LawnSite Bronze Member
    Posts: 1,540

    Thanks thats what i'll do!

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