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Thread: Backflow Preventer

  1. #1

    Default Backflow Preventer

    Heres an easy one for you pros. I am plumbing in my new Weil Mcclain CGa4 boiler and I have come to the Watts backflow preventer. I have found copious amounts of information online (especially right here on Terry's site!) on the rest of the system but I cannot find any info on how to plumb the vent on the side of the backflow preventer. My old oil burning boiler didn't have one and the one illustrated diagram I have found shows it vented to the floor. How much and how often can I count on this thing spewing? Do I need to keep a bucket under a vent line or plumb it to the sump pump. Any enlightenment would be greatly appreciated. Thanks, Dan

  2. #2
    Master Plumber nhmaster's Avatar
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    Default

    It should be piped to within 6" of the floor and it the system is operating properly there will be no leak form it. If a backflow situation occurs then it will relieve.

  3. #3

    Default Thanks

    Thanks for the quick response. That's what I figured but I want to do this by the numbers and I feel better having some confirmation. I'll pipe it down into a plastic bucket and hope it never gets used (knocking wood). Thanks again, Dan

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