Hart Cooley 7r18 Type B Vent Round Pipe 7x18 in

Product Description

The HART COOLEY 7r18 is a double-wall Type B vent round pipe designed for Category 1 gas appliance venting applications. The pipe measures 7 inches in diameter and 18 inches in length, with an aluminum inner wall and a galvanized steel outer wall. This construction promotes draft while limiting heat transfer to surrounding materials. Licensed HVAC technicians and plumbers install this pipe as part of listed B-vent systems on natural gas and propane appliances including furnaces, boilers, and water heaters. It weighs 3.5 pounds and handles the low-positive or negative static pressure conditions typical of Category 1 appliances.

This pipe section is used in residential and light commercial Category 1 venting systems where the flue gas temperature is relatively low and condensation is unlikely under normal operating conditions. It connects within a complete B-vent system assembly to route combustion gases from the appliance to the exterior termination. It is suited for new installations and replacements in existing B-vent runs of matching diameter.

Key Features

• Double-wall construction with aluminum inner wall and galvanized outer wall
• 7-inch diameter sized for Category 1 appliances requiring this vent diameter
• 18-inch section length for flexible run configuration
• Round pipe profile for standard B-vent fittings and components
• Lightweight at 3.5 pounds for easier handling during overhead or vertical installation

Compatibility

Designed as an OEM-style replacement or new-installation component for Type B double-wall vent systems serving Category 1 gas appliances with a 7-inch vent diameter requirement.

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 applicable local mechanical codes. Shut off the gas supply and allow the appliance to cool completely before servicing any vent section. Maintain required clearances to combustibles as specified by the vent system listing. Do not mix B-vent components from different manufacturers within the same vent system unless explicitly listed for combined use.

Technical Specifications

• Diameter: 7 inches
• Length: 18 inches
• Pipe Shape: Round
• Vent Type: Type B Double Wall
• Venting Category: Category 1
• Inner Material: Aluminum
• Outer Material: Galvanized Steel
• Weight: 3.5 pounds

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 7r18