Imperial Mfg Group Usa Inc BM0063 Black Flue Increaser

Product Description

The IMPERIAL MFG GROUP USA INC BM0063 is a 24-gauge black flue increaser designed to transition single-wall black stovepipe from a 7-inch diameter to an 8-inch diameter connection. The large end is crimped for straightforward slip-fit assembly into the next pipe section. This type of increaser is a standard component in Type B and single-wall black vent systems, used when a venting run requires a step-up in pipe diameter. HVAC technicians and heating contractors install this fitting during new appliance hookups or vent system modifications where diameter changes are required by the appliance manufacturer or local code.

This increaser is appropriate for residential and light-commercial heating applications involving solid-fuel or gas-burning appliances connected with single-wall black stovepipe. It is typically installed inline between the appliance collar and the main flue run where a 7-inch outlet must connect to an 8-inch vent pipe. The crimped large end allows it to insert directly into a standard 8-inch pipe section without additional fittings. It is sold in a package quantity of 12 units, making it suitable for supply houses, mechanical contractors, and stocking distributors.

Key Features

• Transitions 7-inch diameter pipe to 8-inch diameter in a single fitting
• 24-gauge black steel construction for single-wall stovepipe applications
• Large end crimped for slip-fit insertion into 8-inch pipe sections
• Packaged in quantities of 12 units per carton

Compatibility

Designed as an OEM-style replacement and standard-stock fitting for single-wall black stovepipe vent systems requiring a 7-inch to 8-inch diameter increase.

Installation Notes

Installation should be performed by a qualified HVAC technician or heating contractor in accordance with NFPA 54, NFPA 211, and applicable local mechanical codes. Shut down and allow the appliance to cool completely before working on any connected flue components. The crimped large end inserts into the female end of the 8-inch pipe; secure all joints with approved sheet metal screws as required by code. Single-wall black stovepipe is generally limited to interior exposed runs and must not be used as a vent connector through walls, floors, or ceilings without the appropriate listed vent system.