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Household Hints

What causes the cold water pipes in your house to make a constant banging sound it seems to be coming from the main water valve in the front of the house?

Answer

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Wiki User
October 20, 2010 3:40AM

Most of the time its caused by lose pipe supports and no expansion tank or air chamber. Most fast closing solenoid valves will be the start of the problem. Copper pipes are usually the loudest and if you can see your pipes just shake them and use extra supports and it should go away, or add air chambers to all of your solenoid valves like dishwashers, fridges, washer machines etc.