Hart Cooley 4EIX6 B-vent Increaser 4 to 6 Inches

Product Description

The HART COOLEY 4EIX6 is a B-vent increaser fitting designed to transition a 4-inch B-vent flue pipe up to a 6-inch B-vent flue pipe. This type-B double-wall gas vent increaser is used where a vent system requires an increase in diameter along the flue run, typically to maintain proper draft or to connect into a larger common vent or vent connector. Licensed HVAC technicians and gas appliance installers work with this fitting during new installations and system modifications on natural gas and propane appliance venting systems.

This increaser is used in residential and light commercial venting applications where type-B double-wall vent systems are required by code. Typical install scenarios include upsizing a single-appliance vent connector into a larger common vent manifold, or transitioning vent diameter at a point specified in the appliance venting tables of the National Fuel Gas Code (NFPA 54) or the International Fuel Gas Code. This fitting serves gas furnaces, water heaters, boilers, and other Category I gas appliances that exhaust through type-B vent.

Key Features

• Transitions B-vent diameter from 4 inches to 6 inches in a single fitting
• Type-B double-wall construction for safe gas vent applications
• Designed for use with natural gas and propane Category I appliances
• Supports proper draft by allowing diameter upsizing along the flue run
• Compatible with standard type-B vent system components at both inlet and outlet diameters

Compatibility

Designed as an OEM-style replacement and new-installation fitting for type-B double-wall gas vent systems with a 4-inch inlet and a 6-inch outlet.

Installation Notes

Installation must be performed by a licensed HVAC technician or qualified gas appliance installer in accordance with NFPA 54 and the appliance manufacturer's venting instructions. Shut off the gas supply and allow the appliance and vent system to cool completely before disassembling any vent sections. Ensure all vent joints are properly secured and that the assembled system maintains the required clearances to combustibles as specified by the vent manufacturer and applicable codes. Do not mix type-B vent components from different manufacturers within the same vent system unless the manufacturers explicitly list those combinations as approved.

Technical Specifications

• Inlet Diameter: 4 inches
• Outlet Diameter: 6 inches
• Vent Type: Type-B Double-Wall Gas Vent
• Application: Natural Gas and Propane Category I Appliances

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 4EIX6