This noise occurs when you turn off the water at a faucet or an appliance quickly. The water flowing through the pipes slams to a stop, causing a hammering noise.
Check for:
- Loose Pipes
Remedy:
- Anchor the pipes.
Check for:
- Faulty air chambers. These lengths of pipe, installed behind fixtures and appliances, hold air that cushions the shock when flowing water is shut off. They can get filled with water and lose their effectiveness.
Remedy:
- To restore air to the chambers, turn off the water at the main shutoff valve. Open all the faucets to drain the system. Close the faucets and turn the water on again. The air chambers should fill with air.
Check for:
- Water pressure that’s above 80 psi (pounds per square inch).
Remedy:
- To lower the pressure, install a pressure-reducing valve (you can call in a plumber to do the work if this is a job you don’t want to do yourself).
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