Wiktionary
n. The tap (of a pair) that produces hot water (the other being the cold tap)
Usage examples of "hot tap".
Cheerful, she turned the hot tap on full and searched through her pack for her cache of bath oil and bubbles.
Then she turned the hot tap on, full blast, and while the tub filled she got a clean towel for Petey and laid out shampoo and soap for him.
He moved the carton of books on to the floor, and let the hot tap run, then washed two glasses, and dried them with the hand towel.
But I didn't dare look at all that morning, flushing the whole lot down with an imperious blast of the hot tap.
The hot tap of the shower produced a blizzard of cold rusty water and then spluttered and stopped altogether.
She ran the hot tap, dipped the shaving brush in it, and worked up a lather in his soap bowl.
But the key was still caked with wet blood and I ran to my bathroom and held it under the hot tap.