Shower pump plumbing

adriang78 · 25 Jun 2010

HI, I'm installing a shower pump and have a question.
I want the unit to sit on the floor, but that would mean I need an extra 3 foot of piping to reach down and the same to get back up to the pipe.
Can I use white flexi pipe or would it have to be copper?

Cheers

BournemouthPlumber · 25 Jun 2010

Flexi pipe (if you mean plastic barrier pipe) is fine. I'd recommend Hep20 grey pipe with John Guest Speedfit fittings if you are going to use plastic.

Make sure its all clipped tightly too.

Should run 22mm pipe from CWSC and DHWC to the pump and then can take it in 15mm to the shower valve

adriang78 · 25 Jun 2010

Sorry, I'm a novice, can you explain CWSC and DHWC please?

Also, the pipe runs up through the attic to the shower, is it a bad idea to have the pump in the attic? I get the general impression that it would be, air traps etc, so I wanted to put it in the airing cupboard, but it would be much simply to stick it in the attic!

And one last thing, I did ask this in the electrical but as yet no reply, could I wire a plug to the pump or does it have to be wired to a wall fuse box (spur?)

Cheers

ChrisR · 25 Jun 2010

I want the unit to sit on the floor

You don't!
Buy a couple of high density concrete blocks and put them on the floor, with the pump atop that. The pump can jiggle about but if it does it on the floor it'll be LOUD. The mass of the blocks means they won't move much. The pump should have rubber feet. You need surprisingly small soft feet to isolate the vibrations.
Some people use carpet or underlay but it squashes quite quickly.
A layer under the concrete might help a bit.

ChrisR · 25 Jun 2010

Cold water storage cistern (tank in the loft)
Hot water storage cylinder

Use a "flange " such as an Essex, Warix or Surrey.

It should be on its own spur but many aren't. And RCD protected.

is it a bad idea to have the pump in the attic?

Yes. Explanation is long - best with a better head of water behind it.

adriang78 · 25 Jun 2010

ChrisR said:
I want the unit to sit on the floor

Click to expand...

You don't!
Buy a couple of high density concrete blocks and put them on the floor, with the pump atop that. The pump can jiggle about but if it does it on the floor it'll be LOUD. The mass of the blocks means they won't move much. The pump should have rubber feet. You need surprisingly small soft feet to isolate the vibrations.
Some people use carpet or underlay but it squashes quite quickly.
A layer under the concrete might help a bit.

Thanks for the tip

BournemouthPlumber · 25 Jun 2010

adriang78 said:
Sorry, I'm a novice, can you explain CWSC and DHWC please?

DHWC - Your hot water cylinder - gnerally found in the airing cupboard
CWSC - You cold water storage cistern - the bigger of the two black tanks up in the loft

ChrisR · 25 Jun 2010

You're too slow, BP!

BournemouthPlumber · 25 Jun 2010

It appears I am!... Friday night after a long week and distracted by the Football!!

I will leave it in your capable hands

adriang78 · 25 Jun 2010

Ok, thanks, probably should have said it's a single impeller, so I'm going for hot only

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Shower pump plumbing

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