navien tankless water heater

  1. S

    Expansion tank questions

    Hi, I need a sanity check please. Developed a pinhole leak in a watts etx-30 expansion tank, about a year old. Contractor is coming back today to replace it. Googling the model, it appears this is a non-potable unit. However, it's been installed on a branch of the cold water line that...
  2. Monguila

    Cold water mixing with hot water - Navien tankless water heater, NPE210A

    I have a Navien tankless water heater – NPE210A. Two weeks ago, the hot water started turning colder after one of two minutes in the shower. Navien’s support had me troubleshoot the issue as follows: 1. Turn the unit off. 2. Close the isolation valves to the cold-supply and...
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