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Motorized valves come in two flavours: 2-port, known as 'zone valves' (a simple open/closed piece of pipe), and 3-port (a fully controlled T-junction). There are two varieties of 3-port valve, mid-position and diverter. With a mid-position valve the middle port is connected to flow from the...

What are the regs regarding the fitting of an electric shower? The obvious one that comes to my mind is do i ned to be part p qualified and what other regs do i need to watch if any???

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and no dont put on two olives it wont work

wrap ptfe tape around the front of the olive and over the front part about 3-4 turns and try that. [/img]

have you checked the outside drain? is this blocked again

valves*

yes go for the pump on that site that you showed me, its should near enough make the pressures equal. Remember double check vales if the shower is of flexible hose (water regs)

ok what about the cold water

r15.14c of water regs book states a double check valve is needed should the spill over level be reached by flexible hose to protect against cat 3 / 5 fluid risks if hose is able to reach spill over levels of toilet = fluid cat 5 bidet = fluid cat 5 or bath = fluid cat 3 then double check be...

but make sure you dont pump mains fed... only pump cylinder hot water or cold can be pumped as long as from a cwsc tank normally in the loft and not the rising main

chris i was thinking the same..

is the shower head of rigid construction? if not it will need a double check valve to prevent backflow. (if unsure stick the double check valves on anyway better safe than sorry) if its mains pressure it will need to be a thermostatic mixing valve, Yes the pump will be ok to pump all or just...

have you tried any imperial sockets

yes a single pump will be good, have you checked what the hot water pressure is running at without a pump?

have you thought about putting the pump next to the hw cylinder thus out the way and powers all hot water

also make sure you have a min 150mm head instead of the normal 1m, this allows the flow switch to open when the supply is turned on :P

its possible to fit a shower pump to the hot water to increase the power, but dont fit a pump on to the mains suppy (cold) unless this is coming from the cold tank in the loft.

found the Problem, it was a very slow leak on the siphon, was hard to spot but got there in the end.. Thanks all.. :wink:

cheers i will take a look mate.