{"product_id":"asc-engineered-solutions-4x3-nb-hex-head-pipe-bushing","title":"Asc Engineered Solutions 4X3.NB Hex Head Pipe Bushing","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ASC Engineered Solutions 4X3.NB is a hex head pipe bushing designed to reduce a 4-inch pipe connection down to a 3-inch fitting. Manufactured from cast iron with a galvanized finish, this bushing features a male NPT (MNPT) inlet and a female NPT (FNPT) outlet, allowing straightforward inline pipe size reduction. Rated at 125 lb, it meets standard pressure requirements for plumbing, gas distribution, and industrial piping systems. The hex head design provides flat wrench surfaces for controlled installation torque. This is a domestic-made fitting intended for installation by licensed plumbers and pipefitters.\u003c\/p\u003e\u003cp\u003eThis bushing is used in residential and commercial piping systems where a 4-inch line must be stepped down to a 3-inch branch or outlet. Common applications include water supply lines, gas distribution headers, fire protection piping, and general industrial process piping. The galvanized cast iron construction makes it suitable for both above-ground and certain exposed indoor installations where corrosion resistance is required. The MNPT x FNPT end configuration threads directly into standard NPT-tapped fittings and valves without adapters.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReduces 4-inch nominal pipe to 3-inch nominal fitting in a single threaded connection\u003c\/li\u003e\n\u003cli\u003eMNPT x FNPT end style for direct NPT system integration\u003c\/li\u003e\n\u003cli\u003e125 lb pressure class cast iron construction\u003c\/li\u003e\n\u003cli\u003eGalvanized finish provides corrosion resistance for indoor and exposed installations\u003c\/li\u003e\n\u003cli\u003eHex head exterior allows secure wrench engagement during installation\u003c\/li\u003e\n\u003cli\u003eDomestically manufactured fitting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting compatible with standard 4-inch x 3-inch NPT cast iron and galvanized piping systems rated at 125 lb class.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or IFGC codes. Shut off and depressurize the pipe system completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male threads before makeup, and tighten using a pipe wrench on the hex head flats. Do not over-torque cast iron fittings, as the material is not ductile and can crack under excessive force.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 4 x 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: MNPT x FNPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Rating\u003c\/strong\u003e: 125 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Galvanized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Style\u003c\/strong\u003e: Hex Head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin\u003c\/strong\u003e: Domestic\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ASC Engineered Solutions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4X3.NB\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ASC ENGINEERED SOLUTIONS","offers":[{"title":"Default Title","offer_id":51524521230642,"sku":"GALBUSH43","price":88.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/faceb73af3b6981b6c671b1e4679baae_fb54e81b-a1f2-486f-8390-1e6520e400ab.jpg?v=1785450690","url":"https:\/\/voomisupply.com\/products\/asc-engineered-solutions-4x3-nb-hex-head-pipe-bushing","provider":"Voomi Supply","version":"1.0","type":"link"}