4" Z-Vent Universal Appliance Adapter w/ Backflow Preventer
Brand: Z-Flex
Part#: 2ZVB04
This appliance adapter connects to the 4" flue outlet of the Takagi tankless water heater and is used to adapt the unit to 4" Z-Vent pipe and venting parts. Has a built-in backflow preventer.

This adapter is required for all types of installations.

Technical Specifications:
  • For Z-Vent (or NovaVent) Pipe Size: 4"
  • Fits Actual Appliance Outlet: 4.0" OD
  • Max. Temperature: 480°F (249°C)
  • Material: AL29-4C
  • Hex Nut Size: 5/16"
  • Certifications/Standards: UL listed for USA and Canada, meets UL 1738
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