{"product_id":"mg-duravent-fswti04-insulated-wall-thimble-4-inch","title":"Mg Duravent FSWTI04 Insulated Wall Thimble 4 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe MG DURAVENT FSWTI04 is a 4-inch insulated wall thimble designed to provide a safe, code-compliant penetration point where a flue or vent pipe passes through a combustible wall assembly. The thimble maintains required clearances between the vent pipe and surrounding framing materials, reducing heat transfer and fire risk. It is a standard component in solid-fuel, wood-burning, and certain gas venting installations where the vent run must exit through an exterior or interior combustible wall. HVAC technicians and chimney professionals install this fitting during new construction and retrofit venting projects.\u003c\/p\u003e\u003cp\u003eThe FSWTI04 is suited for residential and light commercial venting applications where a 4-inch vent pipe must transition through a wall. It is used in conjunction with compatible single-wall or double-wall vent pipe systems to complete a properly insulated and protected wall pass-through. Typical installations include wood stoves, fireplaces, and other appliances that require a dedicated venting pathway routed horizontally through an exterior wall.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eInsulated construction maintains clearance to combustibles at the wall penetration\u003c\/li\u003e\n\u003cli\u003eSized for 4-inch vent pipe diameter\u003c\/li\u003e\n\u003cli\u003eDesigned for use in combustible wall assemblies\u003c\/li\u003e\n\u003cli\u003eSupports code-compliant horizontal vent routing through exterior or interior walls\u003c\/li\u003e\n\u003cli\u003eCompatible with standard 4-inch venting system components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation component for 4-inch insulated venting systems used with wood-burning and solid-fuel appliances requiring a wall thimble penetration fitting.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified HVAC technician or chimney professional in accordance with local building codes and the appliance manufacturer's instructions. Ensure the appliance is fully shut down and cooled before beginning any work on the venting system. The wall opening must be sized and framed to the clearances specified by the vent system manufacturer and applicable codes. Do not compress or bypass the insulated thimble assembly, as doing so reduces required clearances to combustible materials.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Diameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation\u003c\/strong\u003e: Insulated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Wall thimble penetration for combustible wall assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MG DURAVENT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: FSWTI04\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"M\u0026G DURAVENT","offers":[{"title":"Default Title","offer_id":51268000481586,"sku":"FSWTI04","price":173.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308913902.jpg?v=1780696562","url":"https:\/\/voomisupply.com\/products\/mg-duravent-fswti04-insulated-wall-thimble-4-inch","provider":"Voomi Supply","version":"1.0","type":"link"}