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The HART COOLEY 3-6sp is a support plate designed for Type B gas vent systems, spanning sizes from 3 inches to 6 inches in diameter. It mounts beneath a B-vent tee to provide stable structural support at floor or ceiling penetration points where the vent changes direction or requires anchoring. The plate is a standard component in residential and light commercial gas appliance venting installations. Licensed HVAC technicians and plumbers install this part during new construction or when servicing existing vented heating equipment such as furnaces, boilers, and water heaters.
This support plate is used in Type B double-wall gas vent assemblies. It is positioned under a B-vent tee fitting to carry the weight of the vertical vent stack and hold it in proper alignment at floor or platform level. It accommodates vent pipe diameters from 3 inches up to 6 inches, making it a versatile component across a range of common residential and light commercial gas appliance venting configurations.
Designed as an OEM-style replacement support plate for Type B double-wall gas vent systems using pipe diameters between 3 inches and 6 inches.
Installation is performed by a licensed HVAC technician or plumber in accordance with the International Fuel Gas Code (IFGC) and the appliance manufacturer's venting instructions. Shut off the gas supply and allow all components to cool before handling any vent sections. The support plate must be secured at the tee location before the vertical vent stack is assembled above it to ensure proper load transfer. Do not substitute this plate for a fire-stop spacer or ceiling support where a listed clearance device is required by code.
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