The CMI Inc Tankless Water Heater Service Valves Complete Kit allows you to easily connect your Tankless Water Heater to your water supply for easy maintenance and control. With your purchase you will receive:(2) 3/4 in. Brass Nipples, (2) Water Connectors 3/4 in. FIP X 3/4 in. FIP X18 in. (1) Gas Connector 3/4 in. x 3/4 in. x 18 in. (1) Pressure Relief Valve, (1) Hot Valve, (1) Cold Valve and FREE PTFE Thread Seal Tape. The valves connect to the Tankless Water Heater with a 3/4 IPS Female connection. The small design makes it easily accessible and can fit in tight spaces.