Camco’s 3/4" Temperature and Pressure Valve with 4" Probe will help protect your RV or home water heater from excessive temperature and water pressure. It's factory set at 150 PSI and 210F. It features epoxy-coated probe to prevent corrosion buildup. 3/4" NPT connection Factory set at 150 PSI and 210F 4" probe Brass body with stainless spring Listed to ANSI Z21.22