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Knocking noise on boiler?

We have been on holiday, returned and turned the water and gas back on. We have a condenser boiler, and when turning on a tap or washing machine a loud banging noise comes from the pipes. Is this an air lock? or possibly something to do with our gas? any remedy ideas?

Nicola 999
July 2008
Heating, Home Heating SystemsNoise Boiler Gas
this is not aproblem with the boiler but with the pressure from the water main try turn the stop cock
down with the water running till banging stops

danny oshea
July 2008
sounds to me like your plate heat exchanger is scaled up, get a good engineer out to descale and put an inline scale reducer on your cold main inlet.

j.

justin
July 2008

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Boiler Banging Noise - Causes & Fixes