Banging Pipes

Jason_3

Gents:
>
> I have an old system..pipes are at least 60 years
> old. Boiler replaced within the last 10 years. When I
> turn the thermostat up over 70 in the house, every so
> often I hear moderate to loud banging in the pipes
> throughout the house. This only happens at the higher temps. This racket can go on for 10
> minutes or more if I dont turn the heating off to stop it. Is this a
> common problem? Am I damaging the system if I let it bang
> itself out? (it does stop after a while). Is it an air
> problem that can be resolved by bleading the system? Much thanks.
>
> Jason

Mark Hunt

It's not air


It is the expansion noise of the pipes growing.

If this syetm was gravity converted to forced circulation, you could experience this problem.

It can be fixed with a new control strategy. Constant circulation with outdoor reset.

Click the "Find a Contractor" link to see who may be in your area that can handle this.

Mark H

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