I want to fit a powerful shower instead of a bath. The existing pipework
to the bath is in 15mm tube (CW is mains supply) and the DHW head is
only about 1m (to planned shower head). Fitting a pumped power shower
would be quite a big job as new 22mm tube would have to be run about
15m through three rooms and a new electric supply (to pump) would be
needed.

I've heard that venturi showers can give a powerful jet and are cheaper
and easier to install. My problem is, even if I go through the loft, the
HW pipe run will still be about 9m and the manufacturers recommend a
maximum run of 10m.

So what sort of performance could I expect from a venturi shower at
this distance/HW head?  Mains supply pressure is pretty good but I've
not measured it.

Also, in the loft, can I take a 22m supply to the shower from the HW
tank vent pipe (as low as possible).  I understand that for a pumped
power shower that some form of flange is required but could I get away
without one for a venturi shower?

Anyone got a venturi shower or installed one that can comment?

Or would a proper pumped shower be a lot better considering the extra
expense and installation difficulty?
Thanks for any advice.
DrSee


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DrSee