The SharkBite tankless water heater service valves kit connects tankless water heaters to your water supply and allows for easy control and hassle-free maintenance. Included in the package are hot and cold valves and a pressure relief valve. The valves connect to the tankless water heater with a 3/4 in. IPS female connection and then connect to water distribution system with SharkBite push-to-connect connections compatible with copper, PEX, and CPVC. The, slim-fit valve design is a perfect fit for recessed or cover boxes.