Homewerks VAWTTAH3C Toilet Tank Anti-Sweat Valve, 1/2"It can handle pressure up to 125 psi and temperatures up to 140 degree f. This can be used as a pressure regulating valve. It is made from heavy duty brass for durability. 1 2" Toilet tank anti sweat valve 3 way installation 1 2 iron pipe size, solder 1 2" or compression 1 2" Hot water adjusting screw allows hot water to be shut off or regulated. WARNING: This product can expose you to chemicals such as lead which is known to the State of California