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  1. leo.volin

    Navien Flaw causing units to fail

    I wish I read earlier....
  2. leo.volin

    NCB-240H recirculating question

    I have a NCB-240 combi unit installed a couple of months ago. Because of the boiler location the hot water now takes longer time to reach the faucets. I do not have a dedicated return pipe and would like to use Watts or Navien's valve to run recirculation and bring hot water faster. 1. Can...
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