Shower pump switching on when hand basin tap is switched on

cono · 7 Mar 2010

Hi

I wonder if anyone has any suggestions as to why my shower pump has just started switching on when the hand basin hot water tap is turned on.

The pump is a Stuart Turner Monsoon. I guess it has been in about 20 years or so without a problem until now.

I had a new boiler installed in late December and this occurence has only just started happening otherwise I might have thought it is linked with that.

Regards
Cono

Nige F · 7 Mar 2010

Maybe a dodgy flow switch

cono · 9 Mar 2010

Hi Nige

Thank you for the prompt reply. What I did not say originally is that it does not do it every time the basin tap is switched on, it is intermittant. Is there a way that I can confirm it is the switch, other than by replacing it? Are you able to advise me where the location of the switch would be and would it be relatively easy for me to replace?

Regards
Cono

Richard C · 9 Mar 2010

The pump flow switch is triggering the pump on; what sort of boiler is it? Either the pump flow switch is faulty as suggested or, (& I’m not a boiler man!) if it’s a Combi, could it be the way the new boiler has been plumbed in

Nige F · 10 Mar 2010

they are generally on the outlet pipes before the flexi connectors

.I`ve not stripped/examined one -Stuart aturner are on the web, and should have prices there etc.

cono · 11 Mar 2010

Hi

Many thanks to everyone for their advice. The boiler is a GlowWorm 30 Hxi, it is an open vent, it is not a combi. I will go on to the Stuart Turner site and see what they say.

Regards
Cono

crockett · 11 Mar 2010

Hi cono. If your supply to your shower is completely independent from the rest of the supply pipework then this shouldn't happen. If the pipework has been spliced into to supply the shower, then the flow switches ( the black, square bits of plastic strapped to the 'out' side of the shower pump with an arrow pointing up ) are picking up some turbulence intermittently and are switching on. pipework alteration may be necessary.

Richard C · 11 Mar 2010

cono said:
The boiler is a GlowWorm 30 Hxi, it is an open vent, it is not a combi.

Well that stuffed that theory then

Go with crockett ; but it's strange it's only just occuring.

crockett · 11 Mar 2010

You're right about that Rich, it is weird. But it could be a temperamental flow switch combined with incorrect plumbing. Have experienced it before where I work..... luckily I don't have to repair, I just get told to replace!! But I take the 'broken' items to my little workshop, order what parts I think may be needed for it and fix it.

cono · 16 Mar 2010

Hi

Sorry for my late response but waiting to see what Stuart Turner had to say. Their response is: Problem caused by air trapped between the pump and what it pumps too. Well the pump only feeds directly to two showers. Also said it may well be a direct result of the boiler being changed but did not amplify on this. I have gone back to them and explained to them that the shower pipework is completely independent from the other household pipework and feeds two showers only, not the other taps etc. I have asked them for advice on how I should release the trapped air.

Regards

Cono

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Shower pump switching on when hand basin tap is switched on

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