Winterizing hoses

Discussion in 'Pesticide & Herbicide Application' started by lawncuttinfoo, Oct 10, 2009.

  1. lawncuttinfoo

    lawncuttinfoo LawnSite Bronze Member
    Messages: 1,010

    how much psi is needed to blow out 300 ft of 1/2" rubber hose?
    Last edited: Oct 10, 2009
  2. lawncuttinfoo

    lawncuttinfoo LawnSite Bronze Member
    Messages: 1,010

    Or aprox. air compressor size needed.
  3. KES

    KES LawnSite Member
    Messages: 94

    I used to do this before I had a shop and I want to say it was around 20 psi. Do not hold me to it, but that is the number that comes to mind. What I did was hook up the air compressor to the tank and turn the supply hose from the tank off and slowly increase the pressure till I got a good flow of liquid coming out of the end and stopped. Of course I only had to do this every once in awhile because of the weather in Alabama.

  4. nighthawk117

    nighthawk117 LawnSite Senior Member
    from MA
    Messages: 279

    It has nothing to do with psi, its the volume of air needed to fill the space and displace the fluid. :waving:
  5. americanlawn

    americanlawn LawnSite Fanatic
    from midwest
    Messages: 5,954

    We crank our 30 gallon air compressor up to 100 psi....way more than enough to blow the lines clean (use rubber tip for a nice fit). With our ride-on's, we empty out the liquid - then put in two gallons of RV anti-freeze, and run it through a little bit 'til the antifreeze comes through. Our warehouse is 60,000 cubic feet, so we don't spend the money to heat it. But we do store our ride-on's in a heated garage just cuz they are pricey machines.

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