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Thread: Expansion Tank Sizing

  1. #16
    In the Trades Tom Sawyer's Avatar
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    Although a PRV has an internal check valve it is not classified as a back flow preventer because it has no intermediate atmospheric vent
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  2. #17
    In the Trades Gary Swart's Avatar
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    Thanks Tom, guess that answers my question.

  3. #18
    DIY Junior Member Schieftain's Avatar
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    Gauge was 75- 80 this morning. Tattle-tale still showed 115 as the spike.

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