Backflow removal necessary?

Discussion in 'Irrigation / Sprinkler Forum' started by Nereus, Nov 2, 2006.

  1. Nereus

    Nereus New Member

    Aug 11, 2006
    Retired but help my son in his lawn care business.
    Joplin Missouri
    First of all, thanks for your input on my last concern.
    I am wondering, why do you have to remove the backflow preventor if you have already blown out the system and there is no longer water to freeze?
    Thanks for your input.
  2. Gary Swart

    Gary Swart In the Trades

    Sep 1, 2004
    Yakima WA
    Some will say that it isn't necessary to pull the BF out, just blow it out, but it's too easy not to pull it to take a chance IMHO. Any water that remained in it would freeze and break the device so I just store mine where it won't freeze.
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  4. kordts

    kordts In the Trades

    Oct 15, 2005
    industrial service plumbing foreman
    exurban Chicago
    An RPZ is made of brass, a soft metal. You don't want to take chances. Plus, you cant blow past the RPZ into the house, so that line coming out of the house would have water in it.
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