Also make sure to get a proof of the impellers material, bronze is the best many use metal that rust and seize over time, insulated and waterpoof pumps also make less noise and if they are air cooled or watercooled as that makes them noisier
Can I get away with using a 0.37kW pump for a double-storey house that is 6.5m from finished ground level to the geyser in the ceiling? 4 people living in the house.
