Hart Cooley 3et Type B Vent Tee 3 Inch Round

Product Description

The HART COOLEY 3et is a 3-inch double-wall Type B gas vent tee designed for use in residential and light-commercial venting systems. It connects to standard Type B round vent pipe to create a tee junction, allowing branch connections within a vertical or horizontal venting run. The round double-wall construction maintains proper flue gas temperature and reduces the risk of condensation on the outer surface. Licensed HVAC technicians and gas appliance installers work with this fitting as part of a complete Type B venting assembly for natural gas and propane appliances.

This tee is sized for 3-inch Type B vent systems and is suited for venting natural gas furnaces, boilers, water heaters, and other Category I gas appliances that require Type B double-wall venting. It is installed where a branch connection is needed in the venting run, such as when combining vent lines from multiple appliances into a common vertical vent.

Key Features

• 3-inch diameter round double-wall Type B vent tee
• Double-wall construction helps maintain flue gas temperature for proper draft
• Round profile for use with standard Type B vent pipe and fittings
• Lightweight at 1 pound for easy handling during installation

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3-inch Type B double-wall round vent systems on residential and light-commercial gas appliances.

Installation Notes

Type B vent fittings must be installed by a licensed HVAC or gas appliance technician in accordance with NFPA 54 and the appliance manufacturer's venting instructions. Always shut off the gas supply and allow the appliance and vent to cool before servicing or modifying any venting component. Verify that all vent sections and fittings are fully engaged and properly supported to maintain required clearances to combustibles. Do not mix Type B vent components from different manufacturers within the same venting system unless the manufacturer explicitly permits it.

Technical Specifications

• Vent Type: Type B Double Wall
• Shape: Round
• Size: 3 inches
• Item Weight: 1 pound

Standard Information

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