Hot Picks Hart Cooley 5e12a B-vent Adjustable Pipe 5×12 Inch

The HART COOLEY 5e12a is a round, adjustable B-vent pipe section used in Type B gas vent systems for residential and light commercial heating appliances. Measuring 5 inches in diameter and 12 inches in length, this section adjusts from 3 inches to 10 inches to accommodate variable installation depths and clearances. It is designed for venting natural gas or propane furnaces, boilers, and water heaters that require a double-wall B-vent flue assembly. HVAC technicians and plumbers install this component when routing exhaust from the appliance collar to the vent stack or through walls and ceilings.

This adjustable pipe section is suited for residential gas appliance venting where the flue run requires a field-adjustable length to meet actual field dimensions. It is commonly used at connection points where fixed-length sections cannot achieve the required span. The round profile and 5-inch diameter accommodate mid-range appliance vent collar sizes typical of residential gas furnaces and water heaters. Installation typically occurs during new construction rough-in or as a replacement section during a vent system service or retrofit.

Key Features

• Adjustable length from 3 inches to 10 inches for flexible field fitting
• 5-inch diameter round profile compatible with standard B-vent fittings and collars
• 12-inch nominal section length provides a broad adjustment range in a compact form
• Lightweight at 1.62 pounds, reducing handling burden during overhead or confined-space installs
• Designed for Type B double-wall gas vent systems on natural gas and propane appliances

Compatibility

Designed as an OEM-style replacement or new-installation component for Type B double-wall gas vent systems using 5-inch diameter round vent pipe.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber in accordance with the appliance manufacturer instructions and applicable codes including the International Fuel Gas Code (IFGC) and NFPA 54. Shut off gas supply and allow the appliance to cool completely before disconnecting or replacing any vent section. Confirm all joints are fully seated and secured per the vent system manufacturer assembly requirements before restoring gas service. Maintain required clearances to combustibles as specified by the vent system rating and local authority having jurisdiction.

Technical Specifications

• Diameter: 5 inches
• Length: 12 inches
• Adjustment Range: 3 inches to 10 inches
• Pipe Shape: Round
• Weight: 1.62 pounds

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 5e12a