Specifications for 1-1/4" Elevated Break-A-Way Tank Tee: Valve composition brass casting; Type L copper tube; Stainless steel lock screws; standard o-ring; precision machining; 1" female & 1-1/4" male NPT threads each side; 1-1/4" NPT thread to tank. Two port has two 3/4" female NPT threads for drain and relief valve and two 1/ 4" female NPT threads for gauge and switch.