"IMM" wrote in message
...

"Andy Hall" wrote in message
...
On 13 Aug 2004 04:28:33 -0700, (armitageshanks)
wrote:

Hi,

Can someone help?

I have installed a mixer shower in my bathroom assuming the cold tank
in the loft above the bathroom and the hot tank in the bedroom next to
the bathroom would all be in the right places to provide a decent
shower.
How wrong was i????????

I have a really nice looking shower with a really annoying dribble
effect?
I have heard that you can get shower pumps to boost the water pressure
which connect onto the hot water cylinder.

Can any kind person confirm whether this will improve the rate at
which the water is forced out, and also and recommendations would be
appreciated.

Thanks,

Nigel

Yes it will do as long as the plumbing is done correctly.

The important thing is that 22mm pipes are used throughout, especially
on the input side of the pump. You can perhaps do the last metre or
so to the shower valve in 15mm if needed.

Shower pumps do not like sucking.
Preferably install the pump in a location such that the main runs of
pipe are on the output side for this reason.

Also, install the pump relatively low. The airing cupboard floor is
usually a good bet. The loft is not.

Nothing wrong with the loft as long as the pump is on the loft floor below
the cold water tanks water level and the inlet pipe goes back to the
cylinder, not teed off the open vent pipe.

It is well worth investing in a good quality pump, and for that, I
would recommend Stuart Turner. These are a very solidly engineered
British made pump for which you can easily and cheaply get spares if
ever needed. You will spend a little more than in the DIY sheds but
can shop around for price.

.andy

To email, substitute .nospam with .gl

I used a Techflow pump on floor of airing cupboard.
http://www.techflow.co.uk/. Had 22mm feeds, mostly 22mm outlets with last
bits in 15mm. See the website for how to plumb in. I put a air release valve
in the hot loop from tank to pump as in my previous house had suffered from
air getting trapped and stopping the pump working.

On thing to bare in mind is you will need to make sure you mixer valve(s)
can cope with the increased pressure, the original ones fitted to my house
were LP (low pressure) and the valves suffered from lack of temperature (and
flow) control as the pump just forced both hot and cold open. Changing to a
HP (high pressure) valve (in same fixing) restored control to the flow and
temperature. Some shower valves (Mira ?) have a plate that can be adjusted
to tell the valve if incoming supply is low or high pressure, which is a
better solution.