We're looking at doing up the bathroom in our house. We have a gravity fed system with hot water cylinder. At the moment there's a shower over the bath which runs of the bath taps. DP wants a separate shower. I've drawn up a couple of plans and today went to a local bathroom showroom. The guy in there said a separate shower might need a pump to ensure the water pressure was enough. I don't really understand why when we have a shower at the moment and have no issues with water pressure. Can anyone explain and would a pump mean we'd be emptying the hot water cylinder more rapidly?