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Water Hammer



  • Very Sleepy
    Very Sleepy Member Posts: 1
    Water Hammer Help

    I live in an old Brownstone with a steam heating system. We have 4 units and the middle two are having a great deal of trouble with water hammer noise. It is especially bad in the early AM when the system first comes on for the day. I am told that one or all of the following may be causing our trouble, the pitch, the valves and the air vents. Are there any other things we need to consider? And how do we best begin to troubleshoot this nightmare? If any one can offer advice I would be most greatful.
    Sleepy Brooklynite
  • Insulate the steam mains

    Check the wet returns to see if they are plugged up.

  • Ken_8
    Ken_8 Member Posts: 1,640

    Not using a setback thermostat may reduce water hammer. However that does not address the real problem. It merely masks it.

    As Noel suggests, make sure all steam pipes are insulated with fiberglass insulation designed for that specific application.

    Next, check all the vents - especially the ones near the ends of the steam mains.

    Next, drop the pressure to a pound or two - max.

    Let us know how you make out.

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