Advise please on shower mixer

[Deleted member 93861]

Hi Last year I replaced a Thermostatic bar shower mixer valve in a rented property and all seemed ok ,but recently the owner said it wasn't working properly .When you turn on the valve nothing happens but if you turn on the bath tap briefly, it works fine ., they also made it work by twisting temperature valve which was not in the default position & seems to be their go to method ,but it didn't work when I tried it.The shower is fed by a pump and feeds another shower on-suite which has no problems, but the pump does not come on if the bath is used. On inspection the filters were clear and when installed again it worked as it should, but the next day people had used and it was not working properly again .Could it be the original installer did not put non return valves on the feeds
Thanks for any advise 🙂

 

[Deleted member 93861]

If you need any assistance our technical team are here to help! Give us a call on 0191 516 2002. Thanks

Good to know cheers

 

[Deleted member 93861]

Hi as to the flange I checked it today it's t'd off on top of the hot water tank ,I know it should have its own dedicated flange but this is not my work- I've just been ask to sort the shower out .Owner's back soon see if she go's for new pump or just leave the shower head low that's working stop gap (thanks Best )
cheers

 

[Welder]

The teeing off is not really a prob. The point of a flange is to reduce air ingress and having it teed as is minimises air hugely. What IS wrong however is no dedicated CW feed from the tank.

Gate valves often calcify and cause reduced flow (especially on the hot) so my own first port of call would be replace those with full bore lever and to test flow rates before replacing the pump wholesale. I would also check the showers filters at the time of the valve changes to try to maximise flow as is.

IIRC those pumps had a negative head kit avail AND could be rebuilt but I'd want to know Why? first.

 

[Best]

Agree with above ^^ - make sure all filters clean and valves full flowing before you make a decision.
Some pumps will not start on hot until cold is first selected due to filters partially blocked on hot supply.