Power shower pump problem

[theoldboy]

I had a water pump fitted some time ago to provide a power shower facility. It seemed to work fine for a while but now there's obviously a problem with pressure/air/cavatation. The pump is fitted very close to the outlet to the hot tank, so I can't see how air is getting in. the pump knocks and screams after it has been running for a while.

i've been reading things and I've come across a reference to a flange of some sort. Any words of wisdom anyone can add?

I would go back to the 'plumbers' (not sure plumber is fair, more like fitters) but they went bust and I can't track him down.

 

[tipper]

I had a water pump fitted some time ago to provide a power shower facility. It seemed to work fine for a while but now there's obviously a problem with pressure/air/cavatation. The pump is fitted very close to the outlet to the hot tank, so I can't see how air is getting in. the pump knocks and screams after it has been running for a while.

It may be the hot water flashing off to steam due to the reduction in pressure caused by the suction of the pump. Try lowering the HW temperature in the cylinder a little to see if that makes any difference.

Also, try to bleed off any air/steam bubbles by moving the temperature control on the shower from hot to cold to hot a couple of times to 'burp' the pipework.

 

[theoldboy]

I'll give the first a try - though I'd have thought the higher the tempreture the less draw needed from the hot.
I guess what I'm really after is a fix as opposed to a work round
thanks for the input.

 

[tipper]

My own was fitted with a special flange to reduce air entrainment I presume and so as not to rob the normal HW flow from the cylinder.
Look further down this page...

Water - Shower Pumps & Flanges

 

[dave ellis]

my shower works but I've just had a new pump fitted, when I turn it on it works, however when I turn it off and leave it off it stops working.

 

[Ray Stafford]

 

[Plumbstar Tom]

Start a new thread pal with full details, this thread is nearly over 4 years old! (closed)