Z-Flex Venting Accessories - 2SVFX04 4" Bosch 125FX / 425EF Adaptor Z Flex SS Venting - For AquaStar 125FX models
The 4" Bosch Adaptor Z-Flex Z-Vent Stainless Steel Venting (2SVFX04) is used with the Bosch AquaStar 125FX / Bosch 425EF tankless water heaters. Used to create a secure venting connection between the flue collar of the Bosch AquaStar 125FX / Bosch 425EF tankless water heater and the existing approved 4" Category III Gas Appliance venting system.
The Bosch AquaStar 125FX / 425EF requires 4" venting. Our 4" Z-Flex Z-Vent venting meets these requirements and 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.