{"product_id":"metal-fab-4mo6-type-b-oval-gas-vent-pipe-4x6-inch","title":"Metal-fab 4MO6 Type B Oval Gas Vent Pipe 4x6 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe METAL-FAB 4MO6 is a Type B double-wall oval gas vent pipe designed for use in residential and light commercial venting systems. This 4-inch diameter by 6-inch length section features an aluminum alloy inner wall at 0.012 inches thick and a G90 galvanized steel outer wall at 0.018 inches thick. The oval profile suits installations where space is limited. A Twist-Lock connection with a locking tab secures joints without sheet metal screws, reducing installation time and the risk of connection failure. Tested and listed to UL 441, this fitting meets the standard for approved gas appliance venting.\u003c\/p\u003e\n\u003cp\u003eThe 4MO6 is used in Type B gas venting runs for natural gas and propane appliances including furnaces, water heaters, and boilers. The oval form factor is selected for venting chases or wall cavities where a round pipe would not fit. It is typically installed by licensed HVAC technicians or plumbers working on gas appliance venting systems in residential construction and retrofit applications. The double-wall design maintains flue gas temperature to support proper draft and reduce condensation within the vent run.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTested and listed to UL 441 for Type B gas appliance venting\u003c\/li\u003e\n  \u003cli\u003eTwist-Lock connection with locking tab — no sheet metal screws required\u003c\/li\u003e\n  \u003cli\u003eDouble-wall construction: aluminum alloy inner wall, G90 galvanized steel outer wall\u003c\/li\u003e\n  \u003cli\u003eInner wall thickness 0.012 inches, outer wall thickness 0.018 inches\u003c\/li\u003e\n  \u003cli\u003eOval profile for space-constrained venting chases and wall cavities\u003c\/li\u003e\n  \u003cli\u003eHemmed flues and casings improve durability and connection reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or system component for Type B gas vent installations using 4-inch oval vent pipe sections listed to UL 441.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation must be performed by a licensed HVAC technician or plumber in accordance with the appliance manufacturer instructions, NFPA 54 National Fuel Gas Code, and local mechanical codes. Shut off the gas supply and allow the appliance to cool completely before servicing any vent section. Align the Twist-Lock connection fully and confirm the locking tab is seated before restoring operation. Maintain required clearances to combustibles as specified by the vent listing and local code.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Type B Double Wall Oval Gas Vent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Wall Material\u003c\/strong\u003e: Aluminum Alloy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Wall Material\u003c\/strong\u003e: G90 Galvanized Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Wall Thickness\u003c\/strong\u003e: 0.012 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Wall Thickness\u003c\/strong\u003e: 0.018 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eListing\u003c\/strong\u003e: UL 441\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: METAL-FAB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4MO6\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"METAL-FAB","offers":[{"title":"Default Title","offer_id":51283904725298,"sku":"4MO6","price":29.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309277768.jpg?v=1781062890","url":"https:\/\/voomisupply.com\/products\/metal-fab-4mo6-type-b-oval-gas-vent-pipe-4x6-inch","provider":"Voomi Supply","version":"1.0","type":"link"}