Hello All

For those of you that were following my shower problems:

I had the shower engineer in today (plumber!) and he found out what was
causing the cycling of the pump.

For the cycling of the pump after the hot water tap was turned off he
told me to fit a non return valve in the hot water output from the HWC
which was advice given on this forum. 10 out of 10

For the pulsing of the pump which would occur at anytime was because
the cold water tank for the shower was lower than the cold water tank
for the HWC. The difference in head was causing the hot water to be
pushed through the pump down the hot water supply pipe to the shower,
through the valve, up to the pump and through into the cold water tank.
This is also why my overflow had been running!!! If you felt the cold
water pipe it was hot!

So my plan of action is to fit the non return valve and to raise the
shower cold water tank to be level with the other. If this doesn't work
then non return valves will be fitted.

Will raising the cold water tank give me more pressure too and hence a
better shower experience? it will need to be raised another metre or
will this be negligable? if not I will just install Non return valves
in the shower supply pipes.

According to the plumber I need a stronger pump to provide me with my
ideal shower experience, he also stated that other body jets that were
finer would provide more pressure, so pete your idea of using wire
insulation may not be so bad after all!

Thanks for your help as usual

Cheers

Richard