{"product_id":"duravent-0704pi-b-vent-round-rigid-pipe-7x48-in-double-wall","title":"Duravent 0704PI B-vent Round Rigid Pipe 7x48 in Double Wall","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe DURAVENT 0704PI is a double wall air-insulated B-vent round rigid pipe section rated for Category I gas appliance venting systems. It measures 7 inches in diameter and 48 inches in length, making it well-suited for long straight vent runs where consistent draft is critical. The double wall air-insulated construction maintains flue gas temperature to support proper natural draft and reduce the risk of condensation within the vent system. Twist-lock connections secure each section during assembly. Licensed gas technicians and HVAC mechanics typically install this pipe as part of a complete B-vent system serving gas furnaces, boilers, and water heaters.\u003c\/p\u003e\u003cp\u003eThis pipe section is designed for residential and light commercial Category I gas appliance installations where a Type B double wall vent is required. It is used in vertical and nearly vertical vent runs connected to natural gas or propane appliances with positive draft and non-positive vent pressure. The 48-inch length reduces the number of joints needed in long runs, improving system integrity and simplifying layout in attic, chase, or utility room installations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e7-inch diameter accommodates common residential and light commercial Category I appliance vent connections\u003c\/li\u003e\n\u003cli\u003e48-inch rigid section length minimizes joint count in long vent runs\u003c\/li\u003e\n\u003cli\u003eDouble wall air-insulated construction maintains flue gas temperature for reliable natural draft\u003c\/li\u003e\n\u003cli\u003eTwist-lock connection system allows secure, tool-minimal field assembly\u003c\/li\u003e\n\u003cli\u003eDesigned for Category I gas appliance venting with non-positive vent pressure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and new-installation component for Category I gas appliance B-vent systems requiring 7-inch diameter double wall round rigid pipe sections.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation must be performed by a licensed HVAC technician or gas appliance installer in accordance with the appliance manufacturer instructions, NFPA 54 (National Fuel Gas Code), and all applicable local codes. Shut off the gas supply and allow the appliance to cool completely before servicing or extending any vent system. Maintain required clearances to combustibles as specified for Type B vent and verify that all twist-lock joints are fully engaged before restoring service. Do not mix B-vent components from different manufacturers without confirming cross-brand compatibility.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 48 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction\u003c\/strong\u003e: Double Wall Air-Insulated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent Type\u003c\/strong\u003e: Type B (B-Vent)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Twist-Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAppliance Category\u003c\/strong\u003e: Category I\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: 0704PI\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DURAVENT","offers":[{"title":"Default Title","offer_id":51345470390578,"sku":"0704PI","price":80.46,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310553266.jpg?v=1782059297","url":"https:\/\/voomisupply.com\/products\/duravent-0704pi-b-vent-round-rigid-pipe-7x48-in-double-wall","provider":"Voomi Supply","version":"1.0","type":"link"}