I don't mind electrical or most mechanical work, but I absolutely hate plumbing. Even replacing toilet parts is a task I hate. Even the shutoff valves never seem to work and always leak afterwards. Anyway, my knowledge of plumbing parts, valves, fittings, etc is poor. First time I had an old stiff and leaking pigtail, I tightened the Acme fitting until it cracked. It seemed like a really poor design, so I used lots of teflon tape on the replacement. Of course, I also used plenty of teflon on the 1/4" inverted male fitting. I was lucky I didn't have a leak. Fortunately I also learned better. Otherwise I would have been using a foot of teflon tape every time I changed the tank.