{"product_id":"hart-cooley-7r3-type-b-vent-round-pipe-7-in-3-ft","title":"Hart Cooley 7r3 Type B Vent Round Pipe 7 in 3 Ft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HART COOLEY 7r3 is a double-wall Type B vent round pipe designed for Category 1 gas appliance venting applications. Measuring 7 inches in diameter and 3 feet in length, it features an aluminum inner wall and a galvanized steel outer wall. This construction maintains the air gap required by Type B vent standards, which helps protect combustible clearances while managing flue gas temperatures. Licensed HVAC technicians and plumbers install this pipe as part of vented gas appliance systems in both new construction and replacement scenarios.\u003c\/p\u003e\u003cp\u003eThis pipe is used in Category 1 gas appliance venting systems, which include natural gas and propane furnaces, boilers, and water heaters that operate with non-positive vent pressure and flue gas temperatures that avoid excessive condensation. The 7-inch diameter suits mid-to-large capacity residential and light commercial appliances. It is installed vertically or at manufacturer-approved angles as part of a continuous B-vent system routed from the appliance draft hood to the terminal cap above the roofline.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDouble-wall construction with aluminum inner wall and galvanized outer wall for Category 1 venting compliance\u003c\/li\u003e\n\u003cli\u003e7-inch diameter accommodates mid-to-large capacity gas appliance vent connections\u003c\/li\u003e\n\u003cli\u003e3-foot section length reduces the number of joints needed in longer vent runs\u003c\/li\u003e\n\u003cli\u003eRound pipe shape provides consistent airflow and straightforward fitting connections\u003c\/li\u003e\n\u003cli\u003eAluminum inner wall resists corrosion from flue gas condensate\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 1 double-wall Type B vent systems requiring 7-inch diameter round pipe sections.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation must be performed by a qualified HVAC technician or plumber in accordance with NFPA 54, the International Fuel Gas Code (IFGC), and local jurisdiction requirements. Always shut off gas supply and allow the appliance to cool completely before servicing or modifying any vent system. Maintain required clearances to combustibles as specified by the vent system manufacturer and applicable codes. Do not mix Type B vent components from different manufacturers within the same vent run unless the system is listed and approved for mixed use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent Type\u003c\/strong\u003e: Type B Double Wall\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent Category\u003c\/strong\u003e: Category 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 7 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 3 feet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Wall Material\u003c\/strong\u003e: Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Wall Material\u003c\/strong\u003e: Galvanized Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 7.38 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HART COOLEY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7r3\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HART \u0026 COOLEY","offers":[{"title":"Default Title","offer_id":51233859698994,"sku":"7R3","price":101.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/307632975.jpg?v=1780110514","url":"https:\/\/voomisupply.com\/products\/hart-cooley-7r3-type-b-vent-round-pipe-7-in-3-ft","provider":"Voomi Supply","version":"1.0","type":"link"}