Is it possible to replace old plumbing parts?
I had to detach the hot water line from the washing machine for another project, and the really old, broken knob could not turn the water on or off properly. The tap slowly dripped no matter how tightly I turned it off. When I turned it back on more than a little bit, it leaked from the knob. Does the whole thing need to be replaced or can I just replace pieces of this old thing?