Hot Water Booster Pump I was called to a new customer last week complaining of poor hot water performance in the second floor bathroom. When I looked at the installation, I was surprised that there was any hot water at all on the second floor The house has three floors and a gravity fed hot water system. Electric Tankless water heater is gaining popularity towards individuals. Its considerably better comparing to the standard water heater tanks. The cold water storage tank is in the loft and feeds the hot water cylinder on the first floor giving about a 7 metre head of water. When hot water is drawn off on the second floor, the water has to go back up about 4. Update.Exe The Sims 4 there. The water obviously struggles and is compounded by the fact that the second floor feed from the cylinder is not a dedicated feed. Therefore, any hot water drawn off from the first or ground floor, stops the hot water flow to the second floor altogether. My solution would be to make the second floor hot water supply a dedicated feed from the cylinder and to add an in line single impeller booster pump. Is this the best solution or can anybody recommend another one apart from moving the cylinder Thankyou for any helpful advice. Pointofuse POU tankless water heaters are located immediately where the water is being used, so the water is almost instantly hot, which reduces water wastage. All Aussie Adventures. Hot Water Systems and Central Heating Systems Explained Descriptions and Diagrams of the different types of hot water systems in a UK home. If you have a gravityfed system with a hot water cylinder and a cold water storage cistern in your loft, you have the most options. You could go for a mixer shower. Depends on the type of tank and its levels of insulation. Hot water use in the evening without the boiler on will also reduce your cylinder temp. Peter is a Hitchin based plumber serving the Herts area for all types of plumbing and heating work.