In my house I have a water pressure issue:
- Pressure is fine everywhere except for the hot water supply to the second floor shower
- There is another shower in the basement that has good water pressure
- The water heater is also in the basement
- Both lines to the shower are copper
The issue is not with the shower head as the hot water pressure is also very low out of the tub faucet compared to the cold pressure. I have disassembled and removed the entire faucet assembly including the cartridge, and when the water is turned back on pressure is low even directly from the pipe. The shut-off valves for hot and cold are fully open as far as I can tell.
So, what could be the issue? Could the hot water line only to that shower be blocked? How can I clear it?
Best Answer
I've had exactly this issue, on the hot line to a tub, and eventually (disassembling the piping as I went) found an elbow almost plugged with solder - a half-inch pipe with a 1/16" or smaller hole through the nearly-plugged fitting. Someone got over-entusiastic feeding solder (probably 40 years ago for the one I found - and someone lived with the tub that way for probably 40 years, which is the puzzling part.)