Just a note that (except for the bathtub, obviously) I did the hot water plumbing, after a quick glue-and-bread run to Meijer. The cap is where the pipe to the bathtub will go; I did everything from there back to the elbow and sleeve just now.
Tomorrow I'll put in my new kitchen faucet and maybe call the gas company to get some actual hot water. Although, sans shower, the point is less urgent. I could clean better, though.
I suppose I could go ahead and hook up my washing machine, too.