Replacing obsolete Laing UCT 909 Recirc pump

Discussion in 'Tankless Water Heater Forum' started by mnschu, Apr 24, 2021.

  1. mnschu

    mnschu New Member

    Apr 24, 2021
    San Jose,ca
    I am looking for advice on replacing a Laing UCT 909 recirc pump used with a tankless water heater.
    Specs here: https://documentlibrary.xylemapplie...37.796466221.1619321512-1842542238.1619321512

    Amazon link here:

    It has the following problems:
    • If the pump is not running, hot water only works at the closest outlet. All other outlets have cold or lukewarm water
      • Believe the check valve is bad
    • The temperature sensor does not seem to work, the pump always run even when hot water is present and the pipes are hot
    • This pump has a timer, and I can only get hot water when the timer turns on the pump, then the pump will run continuously, even when water gets hot
      • So I really need to run the pump at all possible times
    • A few years back one of the impellers broke. I opened it up and removed the broken pieces, so it has been running at lower efficiency ever since
    I would like to replace this pump as it seems it is coming to the end of its life.
    However, it is obsolete and no longer manufactured.

    Can someone recommend a replacement pump that would be an easy retrofit?
  2. fitter30

    fitter30 Well-Known Member

    Feb 2, 2020
    Retired service tech
    Peace valley missouri
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  4. lifespeed

    lifespeed Member

    Apr 27, 2007
  5. David Zeidman

    David Zeidman New Member

    Jul 11, 2021
    Hi, I have 2 Laing UTC-909 brand new in stock. I am local in Belmont.
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