5" Z-Flex Universal Appliance Vent Adapter

Appliance adapters are used to connect your tankless water heater, boiler, or commercial boiler to the proper diameter of z-flex / z-vent al29-4c stainless steel vent pipe. Most tankless water heaters and boilers require an appliance adapter. For double wall installations, you will also need a single to double wall adapter, which will attach to the appliance adapter.