Z-Flex Universal Appliance Adapter, Condensate Drain, Backflow Stop 3" 4" 5"

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

Also, use this part to drain condensate from high-heat appliances, especially "non-condensing" tankless water heaters. Condensate drain tube is sold separately here.

  •  3", 4" or 5" diameter sizes available
  •  Overall length, 10.75"
  •  3/8" condensation drain
  •  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:

The 4" diameter version of this item 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/Outdoor Propane/NG
Takagi T-K4 Indoor/Outdoor Propane/NG

Download

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

Drain damage due to condensate from a tankless water heater. Even if the drain is plastic and is impervious, local building code may require use of a neutralizer.