Rheem SP12574 Temperature and Pressure Relief Valve For best results, use only Rheem replacement parts for repairing your Rheem Water Heater Maximum Temperature Setting (Deg. F): 210, Maximum Pressure Setting (psi): 150, CSA Capacity (BTU/HR): 105,000, Inlet Thread Size - NPT (in.): 3/4 Outlet Thread Size - NPT (in.): 3/4, Overall Length (in.): 7-1/4, Body Length (in.): 3-1/4, Sensor Length (in.): 4 Kits which contain this part: 45W613