circulation pump

  1. B

    Navien CH-240 circ pump blowing 5A fuses

    I have been helping a friend with a combi unit (Navien CH-240 ASME) issue and am in need of some advice... I maintain my own tankless system but only for DHW so I know enough to be dangerous! Hopefully this is the right forum for this topic. Short story: What started with a small leak at the...
  2. Gnomer

    Help me understand this setup

    One of our propane water heaters is leaking. I'm not replacing it myself and have someone setup to come out. But, I'm trying to understand the set up. I drew a diagram of how they are installed below. I believe these are considered to be in parallel but I don't understand the circulation pump on...
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