re: Calling plumbers of TD

^^^ Correct. The tee is 3/8 compression, the faucet will be 1/2 Female iron pipe. Additionally, you can buy a couple of 3/8 comp x 3/8 comp lavatory flexs and daisy cahin them with a 3/8 compression union: Union Just take the brass nuts and ferrules off and screw the flexs onto the union to use it as a coupling (most hoses are 20" so if you have a further span, the union/coupling and an additional 3/8 x 3/8 flex is the fastest and cheapest option.