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"• Can be installed either vertically or horizontally. • 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 GasA. O. Smith ATI-310-N/P Indoor Propane/Natural GasA. O. Smith ATI-110-N/P Indoor Propane/Natural GasGSW GSWT-110/310GSW GSWT-520/540Marey 5LMarey 10LReliance Water Heaters TS-510-GIReliance Water Heaters TS-310-GIReliance Water Heaters TS-110-GIState Industries 510 SeriesState Industries 310 Series State Industries 110 Series Takagi T-T-KJr2 Indoor/Outdoor Propane/NGTakagi T-K4 Indoor/Outdoor Propane/NGplus: flue outlets of some models of Bosch, Laars, Modine, Nortec, Paloma, Reznor, and Rheem Equivalent to Takagi item number 9007996005 Downloads Z-Vent SVE Series IV Installation and Maintenance Instructions, 3" to 24", Single & Double Wall Z-Vent Dimensional Specifications 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.