DIY - Shower Pumps Confusion

Monster

Monster

Monster

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Morning,

Seeing how helpful my last DIY question on here was I thought it go for another (we really need a DIY forum please!).

Ok so its now 4 weeks till move in and we dont have a kitchen or bathroom or any rooms finished but I have got some pipework sorted..ish.

I'm looking to install a shower pump for a thermostatic mixer shower and am a little confused where to put the pump, the options are:

1. Install the pump at the base of the hot water cylinder in the airing cupboard, its very tight but could just about fit. This would then pump the cold and hot up into the loft, across the loft and down in a wall to the mixer.

2. Install the pump at the base of the bath/under the shower. Cold feed is simple, straight down from the loft. Hot would need to be connected up into the loft and then down, would this cause issues? Pump then connects back into the wall and up to the mixer.

3. Install in the airing cupboard, pipes then run into the floor and pop out from the floor under the bath and up to the mixer, wouldnt be an overly straight run due to the joists and such.

Any help would be appreciated.

NB. Electrics are easiest for the under bath connection to pump.
 
stick it in the easiest place it can be installed.. im sure you already know but the cold feed for a pumped power shower needs to be off a header tank and not mains and obviously the hot too..

if you have a combi boiler, both hot and cold are already off the mains and a power shower isnt needed..
 
Monster said:
Morning,

Seeing how helpful my last DIY question on here was I thought it go for another (we really need a DIY forum please!).

Ok so its now 4 weeks till move in and we dont have a kitchen or bathroom or any rooms finished but I have got some pipework sorted..ish.

I'm looking to install a shower pump for a thermostatic mixer shower and am a little confused where to put the pump, the options are:

1. Install the pump at the base of the hot water cylinder in the airing cupboard, its very tight but could just about fit. This would then pump the cold and hot up into the loft, across the loft and down in a wall to the mixer.

2. Install the pump at the base of the bath/under the shower. Cold feed is simple, straight down from the loft. Hot would need to be connected up into the loft and then down, would this cause issues? Pump then connects back into the wall and up to the mixer.

3. Install in the airing cupboard, pipes then run into the floor and pop out from the floor under the bath and up to the mixer, wouldnt be an overly straight run due to the joists and such.

Any help would be appreciated.

NB. Electrics are easiest for the under bath connection to pump.
Click to expand...

Recently moved into my own house and went the second route with my own Shower pump mainly because if there is ever a problem the space it's in under the bath has more room to work in than other spots like the airing cupboard etc...
 
In my old house I installed it in the base of the airing cupboard, the hot and cold feed were close as well as a electricity supply. I then run pipes to the shower up into the loft space and across into the bathroom.
 
I guess you need to think about positive or negative head and get the right pump. We have a Salamader one which you can run in either mode. It was not origianlly installed with a surrey Flange in the hot water tank and this caused all kinds of problerms with caviation in the pump.
 
Capn' $qu!ff said:
Recently moved into my own house and went the second route with my own Shower pump mainly because if there is ever a problem the space it's in under the bath has more room to work in than other spots like the airing cupboard etc...
Click to expand...

That sounds like a good plan as the airing cupboard is very small.

So the cold feed from the tank comes down and into the pump, got that bit.

The hot though, what flange did you install and did you just run that straight up into the loft and then down to the pump? Any issues to date?

We have a vented hot water cylinder currently if that makes any difference with a normal boiler, not a combi.
 
Monster said:
That sounds like a good plan as the airing cupboard is very small.

So the cold feed from the tank comes down and into the pump, got that bit.

The hot though, what flange did you install and did you just run that straight up into the loft and then down to the pump? Any issues to date?

We have a vented hot water cylinder currently if that makes any difference with a normal boiler, not a combi.
Click to expand...

Can't remeber off the top of my head what flange we used I'll take a look when I get back but we did just run it straight up to the loft and down to the pump. No issues to Date and as stated by PPete you will need a FCU.

PistolPete said:
Under the bath is OK provided it's hooked up to a FCU outside the bathroom and protected by a 30mA RCD too.
Click to expand...
 
Excellent and thanks about the FCU, will be getting my electrician to sort that out, i'll make sure he does it!

If you can let me know the flange ill start getting something organised.

How noisy are the pumps nowadays? Is there any sort of acoustic mat I could sit it on under the bath?
 
You can get low voltage pumps which are quieter.

I had Grundfos Watermill DANUB fitted under the bath at my last flat, not sure if it was 12v or 24v.
 
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