Z-Flex Venting Accessories - 2ZVB04 4" Universal Appliance Adaptor w/ Back-Flow Preventer - For AquaStar 125FX models
4" Universal Appliance Adaptor with Back-Flow Preventer (2ZVB04) for all Takagi, Paloma, Rheem, Noritz, Laars, Nortec, Reznor and Modine tankless water heaters that require Z-Flex Z-Vent Stainless Steel Venting.
This Universal Appliance Adaptor with Back-Flow Preventer has seals on both ends (female on both ends) and has a back-flow preventer built in.
The back-flow preventer is useful in colder climates to prevent cold air from flowing back into your heat exchanger where it could cause damage. The universal adaptor connects the tankless water heater to the 4" Z-Flex Z-Vent Stainless Steel Venting.
4" stainless steel venting for Category III Gas Appliances is the perfect venting option for the Bosch AquaStar 240FX, AquaStar 125FX, Takagi TK1, TK2, TKD20, TKJR, TK1S, TM1, Paloma, Rheem, Noritz, Laars, Nortec, Reznor and Modine Tankless Water Heaters. Our Z-Flex Z-Vent venting is rated AL29-4C.
Z-Flex Z-Vent is approved for Category I (vertical only), II, III & IV applications and is designed for use with boilers, high efficiency gas and oil heaters and water heaters where cool flue gases are vented under pressure. Z-Vent contains a built-in, fail-safe gasket and locking band connection. No sealant is required.