{"product_id":"schaefer-brush-43662-tube-brush-3-75-in-dia-8-in-oal-brass","title":"Schaefer Brush 43662 Tube Brush 3.75 in Dia 8 in Oal Brass","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SCHAEFER BRUSH 43662 is a double stem, single spiral tube brush designed for cleaning the interior of tubes, pipes, and cylindrical passages. It features a 3.75-inch brush diameter and an overall length of 8 inches, with a brush scrubbing length of 4.5 inches. The brass fill material provides effective scrubbing action while remaining compatible with surfaces where ferrous abrasion is a concern. Connection is made via a 0.25-inch NPSM threaded fitting, allowing attachment to standard extension rods or handles. This brush is used by HVAC technicians, plumbers, and industrial maintenance professionals for bore cleaning and tube maintenance tasks.\u003c\/p\u003e\n\u003cp\u003eThis tube brush is suited for cleaning heat exchanger tubes, condenser tubes, boiler tubes, and similar cylindrical passages encountered in commercial and residential HVAC and plumbing service work. The double stem construction provides added rigidity, helping the brush maintain consistent contact with tube walls across the full brush length. It is a practical choice for technicians who need a durable, threaded-connection brush for routine cleaning and preventive maintenance operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3.75-inch brush diameter for use in correspondingly sized tubes and bores\u003c\/li\u003e\n  \u003cli\u003e8-inch overall length with a 4.5-inch brush scrubbing section\u003c\/li\u003e\n  \u003cli\u003eBrass fill material for effective cleaning with reduced surface damage risk\u003c\/li\u003e\n  \u003cli\u003eDouble stem, single spiral construction adds rigidity and consistent wall contact\u003c\/li\u003e\n  \u003cli\u003e0.25-inch NPSM threaded connection for use with standard extension rods\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and service brush for use in tube and pipe cleaning applications where a 3.75-inch diameter, NPSM-threaded tube brush is required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use should be performed by qualified HVAC technicians, plumbers, or industrial maintenance personnel. Before cleaning any tube or heat exchanger, shut down and de-energize the associated equipment per standard lockout\/tagout procedures. Thread the brush onto a compatible extension rod by hand before applying rotational force to avoid cross-threading the NPSM connection. Do not force the brush through bores smaller than the rated brush diameter, as this can damage both the brush and the tube surface.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrush Diameter\u003c\/strong\u003e: 3.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 8 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\u003eConnection Type\u003c\/strong\u003e: NPSM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrush Material\u003c\/strong\u003e: Brass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.56 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 43662\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCHAEFER BRUSH","offers":[{"title":"Default Title","offer_id":51541454782770,"sku":"43662","price":34.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a6e4846dbf436655fe43b1a340e28df4_af8ff32d-ddeb-43dc-9547-3cd283c67fbc.jpg?v=1785876567","url":"https:\/\/voomisupply.com\/products\/schaefer-brush-43662-tube-brush-3-75-in-dia-8-in-oal-brass","provider":"Voomi Supply","version":"1.0","type":"link"}