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The HART COOLEY 8r12a is an 8-inch round B-vent adjustable pipe section designed for gas appliance venting installations. This pipe adjusts in length from 3 inches to 10 inches, providing flexibility when fitting vent runs between fixed components. B-vent pipe is used to exhaust flue gases from Type B gas appliances including furnaces, boilers, and water heaters. Licensed HVAC technicians and plumbers install this type of fitting when precise length adjustments are needed to complete a vent run without cutting fixed-length pipe sections.
This adjustable pipe section is suited for residential and light commercial gas appliance venting systems where Type B double-wall vent pipe is specified. It is typically installed in vertical or near-vertical vent runs connected to natural gas or propane appliances rated for Type B venting. The adjustable design accommodates minor dimensional variations encountered during installation, making it a practical component for new construction and retrofit applications.
Designed as an OEM-style replacement and new-installation component for 8-inch Type B double-wall gas vent systems.
Installation of B-vent pipe must 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). Always shut off gas supply and allow the appliance and vent to cool before servicing or modifying any vent section. Maintain required clearances to combustibles as specified by the vent manufacturer and local code. Do not mix vent pipe brands or diameters within the same vent system unless verified as compatible by the manufacturer.
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