Hello All, We are building a new downstairs bathroom at the front of the house in a porch type arrangement. We currently have a single bathroom on the first floor. The hot water tank is also on the first floor, adjacent to the bathroom and we have a shower pump to boost the flow. The new bathroom will have a sink and a walk-in shower & loo. One option is to run hot water and tank supplied cold water to the room, with the pipes supplying the sink and a split that goes to a pump to ensure decent flows in the shower. The pipe runs from these upstairs supplies to the new bathroom will be in region of 18m each. One problem I can envisage with this is the time taken for the hot water to get to the sink and shower. Would there be a system where the new bathroom is fed with only cold water, either from the main cold supply (in the kitchen), or the cold water tank upstairs. For the sink hot water supply to sink it could go through one of those 'instant' electric hot water heaters. For the shower the single cold supply will go to a combined pump/heater to supply the shower. In the shower we want a simple, minimal, shower control - not a big plastic box with heater/pump inside. There is no room for a cold water tank closer to (or in) the new bathroom but there will be room for a pump/heater to to be boxed in - but accessible for servicing. As usual money is tight an I plan to do the donkey work of running pipe under the floors and for a qualified plumber to do the connections/installations. I'd like to use poly type pipe for speed/ease. What are your thoughts please and many thanks in anticipation of your help.