{"product_id":"smith-blair-421-04460560-031-4-inch-steel-bolted-coupling","title":"Smith Blair 421-04460560-031 4 Inch Steel Bolted Coupling","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SMITH BLAIR 421-04460560-031 is a 4-inch top-bolt steel bolted coupling designed for joining pipe sections in water, wastewater, and industrial piping systems. This style of bolted coupling uses a top-bolt configuration to draw housing segments together around the pipe, creating a mechanical joint that accommodates minor misalignment and end movement. Fabricated from steel, the coupling provides the structural rigidity required for buried or exposed service in demanding utility and municipal applications. It is typically installed by plumbers, pipefitters, and utility crew technicians working on distribution and transmission mains.\u003c\/p\u003e\n\u003cp\u003eThis coupling is suited for residential, commercial, and municipal piping applications where a reliable mechanical joint is needed on 4-inch pipe. Top-bolt couplings of this type are commonly used in water main repairs, service line connections, and wastewater force main installations. The bolted design allows for field assembly without special tooling beyond standard wrenches, making it practical for trench work and tight-space installations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-inch nominal pipe size for compatibility with standard 4-inch pipe OD ranges\u003c\/li\u003e\n  \u003cli\u003eTop-bolt configuration simplifies tightening access in trench or confined-space installs\u003c\/li\u003e\n  \u003cli\u003eSteel construction provides high structural strength for buried and exposed service\u003c\/li\u003e\n  \u003cli\u003eBolted housing segments draw together evenly for a consistent mechanical seal\u003c\/li\u003e\n  \u003cli\u003eAccommodates minor pipe misalignment and angular deflection typical of field conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style mechanical replacement coupling for 4-inch nominal pipe in water, wastewater, and industrial piping systems. Refer to SMITH BLAIR sizing charts to confirm pipe outside diameter compatibility before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or qualified pipefitter in accordance with local plumbing codes and applicable AWWA standards. Depressurize and isolate the pipe section before beginning any coupling work. Tighten bolts evenly in an alternating sequence to achieve uniform gasket compression — do not fully torque one bolt before progressing to others. Inspect gasket seating and pipe end condition before final assembly.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePipe Size\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoupling Style\u003c\/strong\u003e: Top Bolt Bolted Coupling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrder Increment\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: SMITH BLAIR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 421-04460560-031\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SMITH - BLAIR","offers":[{"title":"Default Title","offer_id":51396347756850,"sku":"4.21045E+13","price":398.75,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312834360.jpg?v=1782829880","url":"https:\/\/voomisupply.com\/products\/smith-blair-421-04460560-031-4-inch-steel-bolted-coupling","provider":"Voomi Supply","version":"1.0","type":"link"}