Camco Temperature & Pressure Relief Valve - 1/2" Valve w/4" Probe [10423]Temperature & Pressure Relief Valve 1 2" Valve with 4" Probe Protect your RV water heater from excessive temperatures and water pressure with corrosion resistant metal T&P valves. All valves are factory set at 150 PSI and are crafted with no gaskets and epoxy coated probes to prevent corrosion buildup. WARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other