a separate flow check valve or a circulator with a flow check valve?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by lmei007, Feb 8, 2012.

  1. lmei007

    lmei007 Member

    Messages:
    178
    Location:
    Maryland
    which way is better for adding a new zone in a hot water heating system, a separate flow check valve + a regular circulator or a circulator with a built in flow check valve?
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