Z-Flex Venting Accessories - 2SVSI0304 3" to 4" Increaser Z Flex Z Vent SS Venting - For AquaStar 2700ES, 2400ES, 2400E Models
3" to 4" Increaser Z-Flex Z-Vent Stainless Steel Venting (2SVSI0304) for the Bosch AquaStar 2700ES / Bosch AquaStar 2400ES / Bosch AquaStar 2400E / Bosch AquaStar 250SX / Bosch 635ES tankless water heater. Used to connect the 3" sleeve of the water heater to an existing approved 4" Category III Gas Appliance venting system.
The Bosch AquaStar 2700ES / Bosch AquaStar 2400ES / Bosch AquaStar 2400E requires 3" or 4" stainless steel venting for Category III Gas Appliances. Our 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.