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The HART COOLEY 3vph is a steel pipe hanger designed to support 3-inch round B-vent pipe in residential and light commercial gas appliance venting systems. This hanger keeps vent sections properly aligned and secured along their run, reducing stress on vent joints and maintaining the clearances required by installation codes. Weighing 0.35 pounds, it is lightweight enough for single-tech installs without additional hardware. HVAC technicians and plumbers rely on hangers like this to maintain correct slope and prevent sag in horizontal vent runs.
This hanger is suited for use with 3-inch double-wall B-vent pipe as part of natural-draft venting systems on gas furnaces, boilers, water heaters, and similar Category I appliances. It is installed at regular intervals along horizontal vent runs to provide continuous support and keep vent sections from pulling apart over time. The round profile fits standard 3-inch B-vent pipe sections and is appropriate for both new installations and repair or replacement service work.
Designed as an OEM-style support accessory for 3-inch round B-vent pipe systems used with natural-draft gas appliances.
Installation is typically performed by a licensed HVAC technician or plumber. Shut off the gas supply and allow the venting system to cool completely before servicing any vent section. Hangers should be spaced according to the vent manufacturer guidelines and applicable codes such as the International Fuel Gas Code (IFGC) to maintain required slope and clearances. Do not use this hanger on vent types or pipe diameters other than those it is rated for.
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