SharkBite 3/4 in. x 3/4 in.x 1/2 in. Thermal Expansion Relief ValveThe SharkBite TER 1 thermal expansion relief valve prevents excessive pressure building up in a closed loop plumbing system. The TER 1 combines a full port ball valve with a pressure relief valve and can be installed in place of an expansion tank. The relief valve on the TER 1 is factory set to relief pressure at 125 psi. This valve is intended for use where supply line pressure does not exceed 200 psi when isolated, and is suited for either cold or