Hart Cooley 7r12 Type B Vent Round Pipe 7in 1ft

Product Description

The HART COOLEY 7r12 is a double-wall Type B gas vent round pipe designed for Category 1 appliance venting applications. It features an aluminum inner wall and a galvanized steel outer wall, a construction that manages flue gas temperatures while reducing the risk of condensation in the vent liner. This pipe section measures 7 inches in diameter and 1 foot in length and weighs 2.5 pounds. Licensed HVAC technicians and plumbers install this pipe as part of listed B-vent systems serving natural gas and propane appliances in residential and light commercial settings.

The 7r12 is used in Category 1 venting systems, which handle non-positive-pressure appliances that produce flue gases at or above their dew point. Typical applications include gas furnaces, water heaters, boilers, and other atmospherically vented appliances routed through interior chases or vertical vent stacks. The 7-inch diameter and 1-foot section length make it a standard building-block component for assembling or extending an existing B-vent run.

Key Features

• Double-wall construction with aluminum inner wall for corrosion resistance against flue gases
• Galvanized steel outer wall provides structural durability and exterior protection
• 7-inch diameter suits a wide range of residential and light commercial Category 1 appliances
• 1-foot section length for precise vent system layout and tight-space fitting
• Round pipe shape for compatibility with standard B-vent fittings, elbows, and terminations

Compatibility

Designed for use in listed double-wall Type B gas vent systems serving Category 1 natural gas and propane appliances. Components must be from the same listed B-vent system; do not mix components from different listed vent system manufacturers within the same vent run.

Installation Notes

Installation must be performed by a qualified HVAC technician or plumber in accordance with the appliance manufacturer instructions, NFPA 54 (National Fuel Gas Code), and all applicable local codes. Shut off the gas supply and allow the appliance to cool completely before servicing or modifying an existing vent system. Maintain required clearances to combustibles as specified by the vent system listing and local building codes. Do not use Type B vent pipe for Category 2, 3, or 4 appliances or for venting solid-fuel-burning equipment.

Technical Specifications

• Vent Category: Category 1
• Diameter: 7 inches
• Length: 12 inches (1 foot)
• Pipe Shape: Round
• Wall Construction: Double Wall
• Inner Material: Aluminum
• Outer Material: Galvanized Steel
• Weight: 2.5 pounds

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 7r12