Water pipe “knock” when taps are turned on?
On January - 14 - 2009
I had a plumber in to service my instant water heater and since then the pipes produce a “knocking” sound when the taps are used (hot & cold), I do not want to call him back, he was a nightmare of a worker, can anyone suggest a cure for my problem. Thanks in advance.
Thanks for everyones answers so far, I am going through all your suggestions, let you know when I find the right "cure".
I suggest you turn down the water pressure at the main stop tap and check if it stops.
Talk soon,
Joe Beaven
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david b Says:
It’s just air bubbles in the lines. You can have a plumber come by and bleed them for you or you can just wait until they clear out on their own.
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Posted on January 14th, 2009 at 9:48 am
Vicky M Says:
mine did this and it was because i had air in pipes. if you run water for few mins from each tap at same time it should go
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Posted on January 14th, 2009 at 10:28 am
cadaholic Says:
There is an air hammer type valve that would probably be needed. Call another bbb type plumber next time!
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Posted on January 14th, 2009 at 10:57 am
Catherine W Says:
There is air in the pipes.
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Posted on January 14th, 2009 at 11:21 am
josiejump1 Says:
I used to live in a flat and the council fitted a combi boiler to the persons flat above me. The only problem was when i turn my cold water tap on then off it would make his pipes bang. So when i was on mornings and started at 6am i would turn the tap on and off a couple of times and you should have heard the noise it made. Lets just say he didn’t need a alarm clock.
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Posted on January 14th, 2009 at 11:31 am
alan t Says:
you do not get air in mains water supply,possible causes loose pipework worn tap and ball valve washers,or the unit itself has not been serviced properly. this can be a plumbers nightmare to find,called water hammer in the trade
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i have been in the plumbing trade 40yrs
Posted on January 14th, 2009 at 11:52 am
want to walk Says:
Water hammer is your problem, caused by loose pipes, or turning of the taps to quick. Have a look at billy bodgers work and see if he has left any pipes uncliped.. Quarter turn taps are a problem in older houses cos they shut the water of to quickly and cause shock waves to flow through pipes giving you the banging noise.. A temp fix can be as simple as turning down the main stop tap a little to reduce flow of water through pipes
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Posted on January 14th, 2009 at 12:26 pm
MICHAEL H Says:
youve got an airlock in your pipes,get a plumber to bleed your system from the boiler.
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Posted on January 14th, 2009 at 12:41 pm
nosdda Says:
I suggest you turn down the water pressure at the main stop tap and check if it stops.
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Plumber.
Posted on January 14th, 2009 at 1:19 pm
tanya e Says:
I agree with nosdda
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Posted on January 14th, 2009 at 2:04 pm