Specifications for 1 1/4" 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" male or female NPT thread to tank; two 3/4" female NPT thread for drain and relief valve; two 1/4" female NPT threads for gauge and switch.