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Discuss Issues with Thermostatic Shower / Noisy Pipes in the Bathrooms, Showers and Wetrooms area at PlumbersForums.net

BumpyPipes

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Hi folks We have a weird problem.
Our shower is a Triton thermoststic run from an Alpha combi boiler.
The pipes began making a noise when the hot water was turned on (any tap) and we realised if the shower thermostat was turned to coldest setting this resolved the noise.
But .. now the hot taps (any) are running warm unless the shower thermostat is turned up - then they run hot - but are noisy! ;)
Any suggestions?
(heating is fine)
 

CBW1982

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The banging noise could be a failed tap insert if ceramic. I highly doubt that the shower thermostat will attribute to the temperature in the rest of your taps, unless there is a back flow issue? Anything changed/installed recently?

P.s - no need to double post ;)
 
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BumpyPipes

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(Oops, sorry). no nothing else has changed.
Its so strange. I’ve just turned on a hot tap and the knocking noise seems to be coming from behind the shower control. The hot tap temperature was just warm this morning and I tried upping the temp control on boiler but it didn’t really make a difference. I thought I’d try turning the shower thermostat to a ‘normal shower’ after that I rerun the hot tap and it was very, very hot (too hot to touch) so I turned down the hot water temp boiler control.
Shower is upstairs, boiler downstairs. Shower works fine apart from a water ‘thud’ when its switched on.
Anything I try/can do to help narrow down or identify the cause? Thanks for your feedback.
 
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BumpyPipes

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(Oops, sorry). no nothing else has changed.
Its so strange. I’ve just turned on a hot tap and the knocking noise seems to be coming from behind the shower control. The hot tap temperature was just warm this morning and I tried upping the temp control on boiler but it didn’t really make a difference. I thought I’d try turning the shower thermostat to a ‘normal shower’ after that I rerun the hot tap and it was very, very hot (too hot to touch) so I turned down the hot water temp boiler control.
Shower is upstairs, boiler downstairs. Shower works fine apart from a water ‘thud’ when its switched on.
Anything I try/can do to help narrow down or identify the cause? Thanks for your feedback.
.. oh the engineer fitted an external expansion trap or something when he called to service it last year.
 

CBW1982

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It could be a failure in the shower cartridge or check valves if it has them then. Any way of isolating th shower feeds?
 
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BumpyPipes

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Perhaps - the shower is back to back with a cupboard. Would it be worth cutting a panel out of the plasterboard to take a look or is that not best way to go about it?
 

CBW1982

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Perhaps - the shower is back to back with a cupboard. Would it be worth cutting a panel out of the plasterboard to take a look or is that not best way to go about it?
I wouldn’t advise that unless you fancy re-plastering? If back 2 back with a cupboard are the pipes not in there?
 
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BumpyPipes

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Yes they are but the cupboard interior is boarded out so pipes are all in the cavity between shower room and cupboard back wall - I think
 

Ben-gee

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open up the wall in the back of the cupboard, cut in two full bore isolating valves then take it from there
 

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