This brass/copper tee is perfect for pressure tank installations where the tank has a 1 1/4" Female connection. For example, Well-X-Trol WX-205, WX-250, WX-251, WX-252, WX-255, WX-302, WX-350 or AO Smith AOS250, AOS251, AOS252, AOS302, AOS350. Tank connection: 1 1/4" MPT The side ports are 1 1/4" MPT / 1" FPT The top ports are 1/4" FPT (for pressure switch / pressure gauge) The front ports are 3/4" FPT (for pressure relief valve / boiler drain) Overall Length: 16"