The valve is rusty and can not be opened. What shall I do?
Remove the handle and lever the stem rotation with a wrench,
For removing loose rust agent Penpen, later replaced
There are pictures, for different valves, then choose different ways of opening.
Spray with rust removing agent on the rusty rotating parts of the valve. Then use an afterburner to make a tentative rotation. Open it and turn it in the opposite direction. And then spray rust remover. Repeat this several times, and the valve will probably open. Seriously rusty valve, if it really can not open, simply replace it.
