no hot water pressure

Hi, I am not getting any hot water from my hot water taps/two showers which are fed from a water pump. It's a gravity fed system Hot water still coming from sources not linked to the pump (kitchen, bath, bathroom sink) No hot water in two showers or en-suite in attic room (hot water tap runs...

Good Morning, I am having issues with my hot water pressure with my powermax 185 boiler. As in I don't have any, the CH works fine and the drip that comes through the tap gets hot too it's just I have no pressure. We've changed the mixer valve twice (first one was faulty and wouldn't allow the...