Noritz® Cable, Quick Connect, For Use With: NR83-DVC, NR981, NRC1111, NRC98, NCC1991, NC1991 Tankless Water Heater
The quick-connect cable is used to link two identical tankless water heaters togetherAllows both heaters to communicate with each other using only one remote controllerSimple installation, just attach the cord to the proper connectors inside each water heaterCompatible with larger residential models and all commercial models