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The IMPERIAL MFG GROUP USA INC BM0353 is an adjustable flue stop designed to seal the opening around a flue pipe where it passes through a ceiling, wall, or floor. It adjusts to fit flue pipe diameters from 6 inches to 8 inches, making it a versatile fit for a range of residential venting applications. The unit is constructed from painted galvanized steel in an almond finish, providing corrosion resistance and a clean appearance against standard ceiling and wall surfaces. An adjustable bar on the backside allows the installer to set the stop securely against the surface. HVAC technicians and plumbers install this component as part of B-vent, single-wall, or similar low-temperature flue systems.
The BM0353 is suited for residential gas appliance venting installations where a finished, adjustable cover plate is needed at the point where a flue pipe penetrates a ceiling or wall surface. It is appropriate for use with gas furnaces, water heaters, and similar appliances that use single-wall or B-vent flue pipe in the 6-inch to 8-inch diameter range. The almond color blends with common interior finishes. Each unit is sold individually, with a package quantity of 12 units per case for stocking purposes.
Designed as an OEM-style replacement or new-installation flue stop for residential gas appliance venting systems using single-wall or B-vent flue pipe in the 6-inch to 8-inch diameter range.
Installation is typically performed by a licensed HVAC technician or plumber during venting system rough-in or service. Shut down the appliance and allow the flue pipe to cool completely before handling any venting components. Ensure the flue pipe penetration opening is sized and fire-stopped in accordance with local mechanical codes and the appliance manufacturer's venting instructions before securing the flue stop. Do not use this component as a substitute for a proper fire-stop or thimble where code requires one.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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