Pipe Noise When Hot Water Is Turned On

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Old 08-08-01, 08:44 AM
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My pipes are making a loud banging sound when we turn the hot water on. It is only happening in the pipes that run to the master bath or our laundry room...these rooms are adjoining. There are usually 5 or 6 hammering like sounds and then it stops. It seems to be inside the wall. Is this a pressure problem? I believe the pipes I have are pvc. Any advice would be appreciated.
 
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  #2  
Old 08-08-01, 09:13 AM
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Cool

Hot water is only run in CPVC plastic pipe. PVC is for cold water and drains only.
It probably is a pressure problem with a loosely installed shared hot water pipe in the wall.
Hot water pressure is controlled by the cold water pressure going into the heater tank. You might try reducing the pressure by closing down the cold water cut-off valve going into the water heater just a bit.
Of course, that will reduce your hot water pressure slightly, but it may be the simplest solution to stopping the banging.
Good Luck!
 
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Old 08-08-01, 09:20 AM
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Thanks...I'll give it a shot this evening.
 
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