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Pressure for blowouts

Discussion in 'Irrigation' started by cjohn2000, Nov 1, 2012.

  1. Mdirrigation

    Mdirrigation LawnSite Silver Member
    Posts: 2,630

    You moved to a company that used tow behind compressors to a company that uses roofing air compressors ? I wouldnt change jobs again the next company may use a bike pump.
  2. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,974

    Which I preferred for backflow assemblies; seven psi is all you need.
  3. Mdirrigation

    Mdirrigation LawnSite Silver Member
    Posts: 2,630

    I use a football pump , easy to carry up with the hose
  4. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,974

    Good for you, I never trusted putting serious air through a backflow assembly because of the possibility of melting/warping the check retainers.
  5. cjohn2000

    cjohn2000 LawnSite Senior Member
    Posts: 554

    Then your really gonna not like this, at my former company I was taught to open all the testcocks and blow air through them with the compressor, but most of them didnt get tested anyway. The cool thing is I get to suggest what we do next year, so I just have to get through this year with the roofing compressor. Funny thing is the guy I am replacing had it set to 120. I think I will stick to the philosophy that less is better as long as the job gets done. Nothing like popping a manifold by a menu board in a drive thru because the new hire isn't paying attention.:hammerhead:
  6. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,646

    What's being used for the air hose? (ID and length) It might reflect on the high pressure setting.
  7. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,431

    Yov're prolly not gonna like this but if their SOP has been to use the roofing compressor you prolly wont change their minds.
    Posted via Mobile Device
  8. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,385

    what he said
  9. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    I had a cold call yesterday, and the guy needs us to blow out the system, and fix the PVB. Seems he used his home air compressor, cranked the pressure, and blew the bonnet and poppet right out of the PVB. It could have very well already been old or weakened, but still.........
  10. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,431

    The power of televison or the internet, go figure.........
    Posted via Mobile Device

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