Hart Cooley 3eft B-vent Tall Roof Flange 3 Inches

Product Description

The HART COOLEY 3eft is a tall roof flange designed for 3-inch Type B gas vent systems. It seals the point where the B-vent pipe penetrates the roof deck, keeping weather out and maintaining the required clearance around the vent pipe. This flange is rated for flat roofs through low-slope applications up to a 1/12 pitch. The tall collar design provides added clearance above the roofline, which is important for proper draft and code-compliant termination height. HVAC technicians and plumbers install this component during gas appliance venting rough-in or when replacing a damaged roof flange on an existing B-vent system.

This roof flange is used in residential gas appliance venting installations where Type B double-wall vent pipe exits through a flat or near-flat roof. Typical applications include venting natural gas furnaces, boilers, water heaters, and other Category I appliances. The flat-to-1/12 pitch rating makes it appropriate for roofs with minimal slope. It is sized for 3-inch B-vent pipe diameter and is intended for use within a complete Type B vent system assembly.

Key Features

• Designed for flat to 1/12 roof pitch applications
• Tall collar design supports proper vent termination height
• Sized for 3-inch Type B double-wall gas vent pipe
• Seals roof penetration against weather infiltration
• Lightweight at 2.40 pounds for easy single-person handling on the roof

Compatibility

Designed as an OEM-style component for use with 3-inch Type B double-wall gas vent systems on flat to low-slope residential roofs.

Installation Notes

Installation is performed by a licensed HVAC technician or plumber as part of a gas appliance venting system. Shut off the gas supply and allow the appliance to cool before servicing any vent components. The flange must be flashed and sealed to the roof deck in accordance with the International Fuel Gas Code (IFGC) and the vent manufacturer's listing requirements. Do not use this flange on roof pitches steeper than 1/12 — a pitch-specific flange is required for greater slopes.

Technical Specifications

• Vent Size: 3 inches
• Roof Pitch Rating: Flat to 1/12
• Vent Type: Type B Double-Wall Gas Vent
• Weight: 2.40 pounds

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 3eft