Finding and fixing the causes of water hammer, a shuddering, knocking or banging noise in water pipes.

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1answer
19 views

Sediment on side of water heater?

Here's an image of my hot water heater that's been knocking fairly hard. Does this give anyone an idea of what was done to this? It looks to me as if someone tried to remove the heating element, in ...
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0answers
29 views

Methods for hot water heater knocking. Do they work?

My son has a home owner's warranty on his new (to him) house. His hot water heater is knocking from sediment build up fairly bad such that, at times, I think someone's shooting off fireworks in the ...
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1answer
60 views

Vacuum Breaker Valve on Hose Bib Humming / Noise

I have one of these vacuum breakers on my outdoor hose faucet. Every time I turn it on, it creates a loud noise in the form of a hum or drone I can hear throughout the house. While I have been able ...
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1answer
50 views

Laundry box and water hammer arrestor

I am trying to install my new washer & dryer combo. There are a few things that I am not sure since plumbing hardware and markings are a bit different in the US compared to once I used in Russia. ...
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1answer
50 views

Why is my water softener hammering during recharge?

My water softener is water hammering during recharge. Any thoughts on what might need to be fixed?
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1answer
87 views

How can I get rid of the knocking sound behind my wall when I turn any tap in the house on or off?

When we turn any of our taps on or off it creates a set pattern of three knocks behind the main bedroom wall. We have a steel framed house. How can we eliminate this sound?
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1answer
161 views

Water hammer or something else?

I'm having a bit of a mysterious problem. A couple of weeks ago I've replaced a dimmer switch in the upstairs bathroom. Of course while working on that I shut off the electricity for that part of the ...
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0answers
32 views

How to replace an arrester behind the valve

My water arrester is in my wall box for my hook-up on my washer but the water valve is in front of it. So the valve is blocking access to the arrester and the arrester is blocking me from taking the ...
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2answers
2k views

Loud noise in the pipes when I turn off my hot water

We have a combi boiler, and recently when you run the shower after turning the hot tap off there is a large banging in the pipes. It only seems to happen with that specific tap (as far as I can tell). ...
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2answers
1k views

Why does the washing machine cause water hammer in the pipes in my bathroom?

We recently replaced the valve in our bathtub/shower as hot water would not go to the shower faucet. Now every time the washing machine fills (located downstairs other side of house), the pipes bang ...
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2answers
2k views

How can I locate and eliminate mysterious water hammer related to humidifier?

In the morning, early, when my thermostat kicks back up, I hear a banging/rattle sound that I've determined is related to my humidifier. It only lasts about 10 seconds so by the time I get down to the ...
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3answers
4k views

How can I stop the loud banging sound in my water pipes when using my clothes washer?

We just bought a townhome and every time we use the LG Front loading washing machine there is a loud bang throughout the pipe system. I checked the back and there are already 2 water hammer arrestors ...
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1answer
644 views

Why does my Rinnai Infinity water heater fire up after turning off the cold tap?

I have a Rinnai Infinity XR20. It's about 3 years old. I've just recently noticed a peculiar issue with it that I hadn't noticed before. If I turn on a cold tap like the one to the garden hose and ...
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3answers
4k views

What causes hammering from a new diverter when other faucets are quickly turned on and off?

We're doing a minor remodel of our master bathroom, and I have replaced the 30+ year old diverter and nearby pipe with a new one from Delta. Now when any faucet in the house is turned on and off ...
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1answer
551 views

Can I reduce or eliminate water hammer without plumbing?

I have a friend who lives in an apartment with terrible water hammer problems which the management is unwilling to fix. I'm curious if there is a product or device that would attach, for instance, to ...
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4answers
34k views

How do I fix a “water hammer” problem?

When I shut off a water faucet or right after the toilet tank refills after flushing, I hear a vibrating sound in my pipes. It last between one and two seconds. On the interwebs, I found out that it'...