Mg Duravent fswti03 Insulated Wall Thimble 3 Inches

Product Description

The MG DURAVENT fswti03 is an insulated wall thimble designed for use with direct-vent and single-wall flue systems where venting passes through a combustible wall assembly. Part of the FasNSeal series, this thimble provides a code-compliant, fire-safe passage for vent pipe through framed wall construction. It measures 3 inches in diameter and 18 inches in length, fabricated from stainless steel for corrosion resistance and long-term durability in high-temperature exhaust environments. Installation is performed by licensed HVAC technicians or qualified vent installers following local mechanical and building codes.

The fswti03 is suited for residential and light commercial venting applications where FasNSeal series vent pipe runs horizontally through an exterior or interior combustible wall. The 3-inch diameter matches standard FasNSeal single-wall vent pipe sizing. It provides the required clearance to combustibles and supports proper vent alignment through wall penetrations in new construction and retrofit installations.

Key Features

• 3-inch diameter fits FasNSeal series single-wall vent pipe
• 18-inch length accommodates standard wall thickness with required clearances
• Stainless steel construction resists corrosion and high exhaust temperatures
• Insulated design maintains proper clearance to combustible framing members
• Part of the FasNSeal system for consistent component compatibility within the series

Compatibility

Designed as an OEM-style replacement and new-installation component for use within the FasNSeal venting system series, sized for 3-inch single-wall vent pipe applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified vent installer in accordance with local mechanical codes and the International Fuel Gas Code (IFGC). Power down or shut off the appliance completely before beginning any vent system work. The wall thimble must be positioned to maintain all required clearances to combustible materials as specified by the vent system manufacturer and applicable codes. Do not reduce or alter the thimble assembly in a way that compromises the fire-safe barrier around the vent pipe.

Technical Specifications

• Diameter: 3 inches
• Length: 18 inches
• Material: Stainless Steel
• Series: FasNSeal

Standard Information

• Brand: MG DURAVENT
• Manufacturer Part Number: fswti03