My house is very old, it still the old house with blocks on the bottom. I just replace a new heater last winter, but I still do not have any hot water in my shower. I went through the whole winter showering in cold water. This year, well, its way to cold to continue through another winter like this. There is hot water in the kitchen sink, but will take up to 10-15 min before it gets hot. The sink in the restroom will not even warm up. What would be the problem? I have replace the hot water gasket in the shower but with no luck. The water heater is at max. Is it the pipes?? If there is water, can it have no hot water though?? Can someone help?? Thanks.