{"product_id":"nibco-b305356-cast-copper-companion-pipe-flange-125-psi","title":"Nibco B305356 Cast Copper Companion Pipe Flange 125 Psi","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe NIBCO B305356 is a cast copper companion pipe flange rated for 125 psi service. It is designed for use on 1-inch pipe with an outside diameter of 4-1\/4 inches and bolt hole centers measuring 3-1\/8 inches across. The flange features a C-style end connection and is manufactured from cast copper alloy conforming to ASTM B584. Companion flanges are used to join pipe sections at valves, equipment connections, or system access points. Licensed plumbers and pipefitters install this fitting in copper piping systems where a bolted flange joint is required.\u003c\/p\u003e\n\u003cp\u003eThis flange is suited for plumbing and mechanical piping systems operating within its 125 psi pressure rating. The cast copper construction makes it appropriate for water service, hydronic heating, and similar fluid-handling applications where copper is the specified pipe material. It is installed as a companion flange, meaning it pairs with a matching flange on the adjoining component to form a bolted, gasketed connection. The C end connection style is compatible with standard copper pipe joining methods.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCast copper construction per ASTM B584 for durability in fluid-handling service\u003c\/li\u003e\n  \u003cli\u003eRated at 125 psi working pressure\u003c\/li\u003e\n  \u003cli\u003eC-style end connection for standard copper pipe joining\u003c\/li\u003e\n  \u003cli\u003e1-inch pipe size with 4-1\/4 inch overall outside diameter\u003c\/li\u003e\n  \u003cli\u003eBolt hole centers at 3-1\/8 inches for consistent bolt-pattern alignment\u003c\/li\u003e\n  \u003cli\u003eCompanion flange design pairs with matching flange for bolted joint assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style companion flange for 1-inch copper piping systems operating at Class 125 pressure ratings.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and local plumbing codes. Shut off and depressurize the system fully before disassembling any existing flange connection. Use a properly rated gasket between mating flange faces and tighten bolts in a cross pattern to ensure even seating. Do not exceed the 125 psi pressure rating of this fitting.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePipe Size\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 4-1\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBolt Hole Centers\u003c\/strong\u003e: 3-1\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Rating\u003c\/strong\u003e: 125 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Connection\u003c\/strong\u003e: C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStyle\u003c\/strong\u003e: Companion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cast Copper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ASTM B584\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.99 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: NIBCO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: B305356\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NIBCO","offers":[{"title":"Default Title","offer_id":51542468755762,"sku":"B305356","price":63.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cc1467afe2fe921e4c17c724babbc5ff_33ce1b86-f9ba-4037-b65e-8361e21ab248.jpg?v=1785901155","url":"https:\/\/voomisupply.com\/products\/nibco-b305356-cast-copper-companion-pipe-flange-125-psi","provider":"Voomi Supply","version":"1.0","type":"link"}