A day spent in the dark depths up and under the various bit of plastic that form our shower unit has now resulted in hot water coming up to the shower head as it should be .. Some twonk had put a feedback loop on the system .. WAY too hard to explain it but after a year plus of fiddling about she is all perfik now ! However........................................................... Now we have a proper system that actually works and is even temperature controllable, a new problem has reared its head. The water pump is plenty good enough for normal sink use ( if you see what I mean ) but as for a shower ! Not enough pressure to get it to actually spray.. it more sort of falls out of all the holes ! The system uses microswitches on the taps, but I could always add a relay in to feed a higher amperage pump if need be The pump is one that is fitted into the tank as usual but is now 20 years old so proly past its sell by date .. What sort of pump would you folks recomend ?