3" Gear Clamp (7HS44XX)

3" Gear Clamps (7HS44XX) for the Bosch AquaStar 2400E / Bosch AquaStar 250SX / Bosch 635ES. Two gear clamps are needed for each piece of aluminum flex intake vent.

The Bosch AquaStar 2400E / Bosch AquaStar 250SX requires 3" 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.

This product is intended for use with the following products:

• AquaStar 2400E NG (Natural Gas) Tankless Water Heater
• AquaStar 2400E LP (Liquid Propane) Tankless Water Heater

• AQ3 Vent Kit for AquaStar 2700ES / 2400E
• AQ3PLUS Vent Kit for AquaStar 2700ES / 2400E
• Wireless Remote Control for Bosch 2700ES / 2400ES / 2400E / 2400EO / 250SX / 250SXO
• Freeze Protection Kit for AquaStar 2400E / 250SX (1124)
• 3" Stainless Steel Venting for the Bosch 2700ES / 2400ES / 2400E / 250SX / 635ES