I have a boiler and hot water tank. I'm getting a new shower installed with a pump. One plumber has told me that I need a new combi boiler as with a pump the hot water in the tank will get used up before the family (3 people) shower. Another plumber suggested that as the central heating heats up quickly but the hot water takes a long time the old tank is probably furred up and replacing it with a larger tank will be adaquate.
Any advice? Obviously the new tank would cost a lot less. But ultimately we all want a nice hot shower in the morning...