Hi all, I'm off to Bulgaria soon to fit a bathroom for a friend and the way the water comes into the house has created a problem with the electric shower (the place is too small for an unvented cylinder). There's no mains supply so a pump is used but the pump only activates when the pressure in the pipes falls below a certain level so it goes on, off, on, off etc. This means the electric shower has more water going through it when the pump comes on and the water goes hot, warm, hot, warm etc. My solution is to fit an in line pressure reducer, reduce the max pressure to 1 bar so the pressure is then constant and the problem goes away. Does that sound right to you guys? I think I'm on the right lines but I'm not 100% sure and I've yet to see what the Bulgarians have in terms of plumbing products!