4" Z-Vent Universal Appliance Adapter w/ Backflow Preventer
Brand: Z-Flex
Part#: 2ZVB04
In Stock
Usually ships: within 1 business days
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.
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Z-vent sticker
I used Z-vent back flow preventer before. However, this time to my surprise sticker on that thing that among other stuff shows flow direction was placed upside down by manufacturer. oops
By Vlad (from NJ) on 03/26/2012

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