Water Preesure and rattling pipes

[carrotmuseum]

Any tap I turn on makes the pipes rumble. Also got water hammer from toilets.

Had a new pressure relief valve installed and turned down the pressure, but makes no difference and low pressure makes the shower run slowly.

Driving me nuts

Any other ideas?

Thanks

JOhn

 

[JAP&H]

Hi carrotmuseum.

Has this always been there or come about recently?

Unsecured pipework can be a source of noise if they move when water flows through.

Try fitting a hammer arrestor, v small expansion vessel. Installed on cold water pipework.

 

[Simon F]

loose washer plate on incoming cold could cause vibration
where is the noise worst?

 

[carrotmuseum]

Just come about. Had a pressure reducer fitted in the house all the time (15 years) so suspected it was faulty. But not.

If I turn down the house stopcock the noises go away, but then not enough pressure for shower.

 

[on31ll]

Most prob unclipped pipework ! Maybe try and find where its at its worst and clip it ? And as said above fit a hammer arrestor ?

 

[mountainman]

I'd rewasher or renew the main stopcock.

 

[carrotmuseum]

loose washer plate on incoming cold could cause vibration
where is the noise worst?

About midway between street meter and house stopcock.

 

[carrotmuseum]

If I just live it, what danger if any is there?

 

[mountainman]

No real danger, it'll just get on your threepennies though.

 

[carrotmuseum]

No real danger, it'll just get on your threepennies though.

Already doing that, but do not want to spend big money chasing a problem which seems to be a mystery. Thanks for the help.

 

[mactatty]

When you say "street meter" do you mean the street stopcock? You could try turning this down - but closing stopcocks only reduces the flow, not the pressure. You've got to look at the street one if the vibration is worst before the water reaches your house stopcock. As it's the responsibility of your water supplier, you could get them along to see if it is causing any of the problem.

 

[carrotmuseum]

Yes street stopcock. Ok, it's Yorkshire Water, not the most communicative or helpful in the world! but worth the question.

Not sure if it is flow or pressure, doesn't one affect the other. I suspect that it is flow causing the noise.

 

[Ged Simpson]

Not sure if it is flow or pressure, doesn't one affect the other. I suspect that it is flow causing the noise.[/QUOTE]

Without pressure there would be no flow. Suddenly shutting off the flow causes a shock wave that rebounds off the cause of the sudden closure (normally a valve). This shock wave then normally dissipates, though it can bounce off other dead ends causing more hammering in the system until it eventually dies out. Common places for this effect can be at the washing machine or dishwasher where the filling valves shut off quickly, also at some toilet cistern filling valves.
Water hammer can cause leaks in joints over time, but are unlikely to burst a pipe. The remedy as previously advised is to fit one or more shock arrestors in the pipe-work close to where the noise is occurring to absorb the shock-wave. This is effectively a hydraulic "cushion".