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Water boiler banging

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Snowmelt
Snowmelt Member Posts: 1,457
in THE MAIN WALL
I have a customer with a water boiler that I think when it shuts off it bangs almost sounds like a steam boiler bang when the steam hits the water..................or when a zone valve closes but it’s three pumps ( taco with ICV 007 ) 2 baseboard zones and 1 radiant floor I all get measurements later but I think linier feet it’s about 120 feet including return to boiler.
If it was air would I be hearing it all the time like an ocean.

Comments

  • JohnNY
    JohnNY Member Posts: 3,339
    When a water boiler bangs it's because it's boiling internally which is created by a lack of flow. Check your pumps and back off of your aquastat 10° or so and then reassess.
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
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  • kcopp
    kcopp Member Posts: 4,628
    What boiler is it? Make/ Model?
  • Snowmelt
    Snowmelt Member Posts: 1,457
    Thanks John, I will back off the aqua stat and see what he get.
    kc, it’s a Utica 80 % standard in chimney , but I look later.

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