please tell me how... I can clean faucets, install showers, etc
Ya want to learn the plumbing trade? Have you got four yrars to spare? We can teach you to do all of that but we'll have to "apprentice" you first.
The other has limited hot duration and next to no cold water pressure--hot pressure is okay.
Since this water heater services one side of the house is the hot water slow in all fixtures or just one? Same question for the cold water. The entire section or just one fixture?
Let me show you how to flush your heater.
For long life and fewer troubles you should keep your heater clear of mineral build-up by
FLUSHING NOT DRAINING on a regular schedule. Attach a hose to the boiler drain at the bottom of the tank.
With the pressure on, open the boiler drain and let it run until the water runs clear. You will see a spurt of red,(rust) followed by white or yellow grains,(lime or calcium carbonate). This shouldn't take more then a few minutes. Do this monthly to keep it clear. Now flush out your hot water lines on ALL fixtures that are affected . Now pull each aerator and clean the screens. Be sure you put them back togather the same way you took them out. Don't forget to flush it out every month. Your heater will thank you for it. Hope this helps, Tom