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Z-Flex 4" Universal Appliance Adapter With Backflow Preventer

by Z-Flex
Original price $88.27 - Original price $93.22
Original price
$88.27 - $93.22
Current price $88.27


Made in America

Useful in colder climates for preventing freezing air from flowing back into the heat exchanger and freezing it and damaging the heater


• Vent material: AL29-4C stainless steel
• Certification: Tested to meet or exceed Underwriters Laboratories (UL) spec UL1738 and ULS636
• Approval: Cat II, III, IV venting
• Limited Lifetime Warranty

Compatibility and cross reference:

This item is the same as Takagi, AO Smith, American Heating part number 9007996005.

It is compatible with the following tankless water heaters, as shown in their manual:

American Water Heaters GT-510-P/N Indoor Liquid Propane/Natural Gas
American Water Heaters GT-310-P/N Indoor Liquid Propane/Natural Gas
American Water Heaters GT110-P/N Indoor Liquid Propane/Natural Gas
A. O. Smith ATI-510-N/P Indoor Propane/Natural Gas
A. O. Smith ATI-310-N/P Indoor Propane/Natural Gas
A. O. Smith ATI-110-N/P Indoor Propane/Natural Gas
GSW GSWT-110/310
GSW GSWT-520/540
Marey 5L
Marey 10L
Reliance Water Heaters TS-510-GI
Reliance Water Heaters TS-310-GI
Reliance Water Heaters TS-110-GI
State Industries 510 Series
State Industries 310 Series
State Industries 110 Series
Takagi T-T-KJr2 Indoor Propane/NG
Takagi T-K4 Indoor Propane/NG

FAQ (Frequently Asked Question)

Q1: Is this 4" adapter with backflow preventer available in 5" diameter, too?

A1: Yes, here is the 5" version of this appliance adapter with backflow preventer.

Here is an appliance adapter, backflow preventer, that also includes a condensate collector and drain if you need it for 3", 4", or 5" diameter pipe. If you do not need the drain hole, Z-Flex tech support instructs to simply plug it. And, you can also buy the Universal Appliance Adapter with no backflow preventor, and buy the backflow preventer alone here.


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