Watts Regulator has introduced the BRV series combination ball and relief valve featuring a compression end fitting to provide a secure method of connection to a discharge line. The Watts BRV is designed to be used as a water heater shutoff valve to provide both a means to shut off water supply to the water heater and to provide protection against excess water pressure caused by thermal expansion. The valve uses a bronze-body, full-port valve design, with Teflon seats and blow-out proof stem design. It is available with solder or thread connections in 3/4 and 1 inch sizes. Watts Regulator.