Z-Flex 4" Universal Appliance Adapter With Backflow Preventer

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

Specifications:

• 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 3" or 5" diameter, too?

A1. We have something very similar here. That includes the condensation drain. If you do not need the drain hole, Z-Flex tech support instructs to simply plug it. Z-Flex does not make a 5" UAA with a backflow preventer and without a condensate drain. And, you can also buy the Universal Appliance Adapter with no backflow preventor, and buy the backflow preventer alone here:

Download

Z-Vent SVE Series IV Installation and Maintenance Instructions, 3" to 24",Single & Double Wall