{"product_id":"duravent-0404pi-b-vent-round-rigid-pipe-4x48-double-wall","title":"Duravent 0404PI B-vent Round Rigid Pipe 4x48 Double Wall","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe DURAVENT 0404PI is a double-wall, air-insulated B-vent round rigid pipe section designed for Category I natural draft gas appliance venting systems. Measuring 4 inches in diameter and 48 inches in length, this pipe section is built for long vent runs where consistent draft performance and safe flue gas conveyance are required. The double-wall air-insulated design maintains flue gas temperature to support proper draft throughout the vent system. Connections are made via a twist-lock mechanism, keeping installation straightforward for HVAC technicians and plumbers working with gas appliance venting.\u003c\/p\u003e\u003cp\u003eThis pipe section is suited for residential and light commercial gas appliance installations where Category I B-vent systems are specified. Typical applications include venting natural gas furnaces, boilers, and water heaters routed through interior chases or along walls. The 48-inch section length reduces the number of joints needed on longer vent runs, which is an advantage in straight vertical or horizontal runs within the allowable slope parameters for B-vent systems.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDouble-wall air-insulated construction maintains flue gas temperature for reliable natural draft\u003c\/li\u003e\n\u003cli\u003e4-inch diameter x 48-inch length suits long interior vent runs\u003c\/li\u003e\n\u003cli\u003eTwist-lock connection system for secure, tool-minimal field assembly\u003c\/li\u003e\n\u003cli\u003eRound rigid pipe profile for use in Category I gas appliance venting systems\u003c\/li\u003e\n\u003cli\u003eDesigned for use with natural draft gas appliances including furnaces, boilers, and water heaters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard component for Category I B-vent gas appliance venting systems requiring 4-inch diameter round rigid pipe sections.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician or plumber in accordance with NFPA 54 (National Fuel Gas Code) and local authority having jurisdiction requirements. Shut off gas supply and allow the appliance to cool fully before servicing or extending an existing vent system. Verify proper slope, clearances to combustibles, and support spacing per the manufacturer instructions and applicable codes before completing the installation. Do not mix B-vent components from different manufacturers within the same vent system unless compatibility is verified.\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\u003ePipe Length\u003c\/strong\u003e: 48 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall Construction\u003c\/strong\u003e: Double-wall air-insulated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Type\u003c\/strong\u003e: Rigid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent Category\u003c\/strong\u003e: Category I (B-Vent)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Twist-lock\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: DURAVENT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 0404PI\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DURAVENT","offers":[{"title":"Default Title","offer_id":51348027703602,"sku":"0404PI","price":79.18,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310553329.jpg?v=1782118516","url":"https:\/\/voomisupply.com\/products\/duravent-0404pi-b-vent-round-rigid-pipe-4x48-double-wall","provider":"Voomi Supply","version":"1.0","type":"link"}