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The IMPERIAL MFG GROUP USA INC GV0931 is a 28-gauge galvanized sheet metal thimble used to create a sealed wall or ceiling penetration for venting applications. Measuring 6 inches by 6 inches, this thimble provides a code-appropriate transition point where a vent connector or flue pipe passes through a combustible or non-combustible surface. The galvanized steel construction resists corrosion and holds up in the high-humidity, high-temperature environments typical of HVAC and heating exhaust systems. HVAC technicians and plumbers commonly install thimbles during new construction and retrofit venting projects to maintain proper clearances and protect surrounding materials.
This thimble is suited for residential and light commercial heating system installations where a vent connector exits through a wall, ceiling, or floor assembly. It is appropriate for use with standard round or rectangular vent connector systems that require a 6-inch by 6-inch opening. Installers working with gas-fired furnaces, boilers, and water heaters will encounter this component during vent system assembly and replacement work. Each package contains 6 units, making it practical for multi-unit jobs or stocking service vehicles.
Designed as an OEM-style replacement and new-installation component for standard vent connector penetration applications requiring a 6-inch by 6-inch galvanized thimble in residential and light commercial heating systems.
Installation is typically performed by a licensed HVAC technician or plumber as part of a vent system assembly. Always shut down and allow the heating appliance to cool completely before working on connected venting components. Verify that the thimble size, clearance requirements, and material ratings comply with local mechanical codes and the appliance manufacturer's venting instructions before cutting any penetration. Follow IFGC and local jurisdiction requirements for clearance-to-combustibles when routing vent connectors through wall or ceiling assemblies.
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