{"product_id":"schaefer-brush-43224-flue-brush-2-5-in-dia-7-5-in-oal","title":"Schaefer Brush 43224 Flue Brush 2.5 in Dia 7.5 in Oal","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SCHAEFER BRUSH 43224 is a double stem, single spiral flue brush designed to clean flue passages, heat exchangers, and combustion venting tubes in residential and commercial heating systems. The brush head is constructed from tempered steel wire, providing the stiffness needed to break up and dislodge soot, scale, and debris from metal flue surfaces. At 2.5 inches in diameter with a brush length of 4.5 inches and an overall length of 7.5 inches, it is sized for standard flue pipe diameters commonly found in gas furnaces, boilers, and B-vent systems. The 1\/4 inch male NPSM connection allows direct attachment to extension rods for deeper access.\u003c\/p\u003e\n\u003cp\u003eThis flue brush is used in routine maintenance and service calls on gas-fired furnaces, boilers, and venting assemblies where flue passages accumulate soot and oxidation over time. HVAC technicians and chimney service professionals typically deploy this brush during annual tune-ups, heat exchanger inspections, and combustion efficiency restoration procedures. The double stem construction helps maintain brush shape under repeated use, making it a practical tool for commercial service contractors handling high-volume maintenance accounts as well as residential service calls.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eTempered steel wire bristles for aggressive cleaning of metal flue surfaces\u003c\/li\u003e\n  \u003cli\u003eDouble stem construction maintains brush form during repeated use\u003c\/li\u003e\n  \u003cli\u003eSingle spiral fill pattern provides consistent contact with flue walls\u003c\/li\u003e\n  \u003cli\u003e2.5 inch diameter fits standard residential and light commercial flue pipe sizes\u003c\/li\u003e\n  \u003cli\u003e1\/4 inch male NPSM connection compatible with standard extension rod systems\u003c\/li\u003e\n  \u003cli\u003eCompact 7.5 inch overall length allows use in confined access areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use on metal flue pipes, heat exchanger passages, and combustion venting tubes with an inside diameter suited to a 2.5 inch brush. Attaches to 1\/4 inch NPSM female extension rods.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis brush is typically used by licensed HVAC technicians or certified chimney service professionals during scheduled maintenance. Before servicing any flue or heat exchanger, shut down and lock out the appliance and allow all surfaces to cool completely. Wear appropriate eye and respiratory protection when dislodging soot and combustion debris. Follow all applicable NFPA and manufacturer service guidelines when accessing flue and venting components.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Double Stem Single Spiral Flue Brush\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrush Length\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 7.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBristle Material\u003c\/strong\u003e: Tempered Steel Wire\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: NPSM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Gender\u003c\/strong\u003e: Male\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.42 pounds\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: SCHAEFER BRUSH\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 43224\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCHAEFER BRUSH","offers":[{"title":"Default Title","offer_id":51542125936946,"sku":"43224","price":21.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/213705e089394797be8474b6fc5d6932.jpg?v=1785892858","url":"https:\/\/voomisupply.com\/products\/schaefer-brush-43224-flue-brush-2-5-in-dia-7-5-in-oal","provider":"Voomi Supply","version":"1.0","type":"link"}