{"product_id":"southwark-metal-58_5x4-pipe-reducer-5x4-inch-galvanized","title":"Southwark Metal 58_5X4 Pipe Reducer 5x4 Inch Galvanized","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SOUTHWARK METAL 58_5X4 is a 3-piece sheet metal pipe reducer designed to transition between a 5-inch diameter duct and a 4-inch diameter duct in forced-air HVAC systems. Fabricated from hot dip galvanized steel, it provides corrosion resistance suitable for both supply and return air applications. The no-crimp design accommodates field installation without requiring a pre-crimped fitting on the connecting pipe. HVAC sheet metal mechanics and duct installers use this reducer to maintain airflow continuity across diameter changes in residential and light commercial ductwork runs.\u003c\/p\u003e\u003cp\u003eThis reducer is suited for residential and light commercial forced-air duct systems where a 5-inch-to-4-inch transition is required. Common install scenarios include branch takeoffs, trunk-to-branch transitions, and air handler connections where duct sizing steps down along the supply or return run. The fitting meets ACCA and SMACNA standards, making it appropriate for duct systems designed and installed to those specifications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTransitions from 5-inch diameter to 4-inch diameter duct\u003c\/li\u003e\n\u003cli\u003eHot dip galvanized steel construction for corrosion resistance\u003c\/li\u003e\n\u003cli\u003e3-piece design for straightforward field assembly\u003c\/li\u003e\n\u003cli\u003eNo crimp supplied — connects to standard uncrimped pipe ends\u003c\/li\u003e\n\u003cli\u003eMeets ACCA and SMACNA applicable standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style sheet metal fitting for use in residential and light commercial forced-air duct systems built to ACCA and SMACNA standards with 5-inch and 4-inch round duct.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified HVAC technician or licensed sheet metal mechanic. Power down the air handling unit at the disconnect before working on the duct system. Secure all joints with sheet metal screws and seal with mastic or UL 181-listed tape per SMACNA and local mechanical code requirements. Verify duct sizing and airflow calculations conform to ACCA Manual D before finalizing the transition location.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarger End Size\u003c\/strong\u003e: 5 inches diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmaller End Size\u003c\/strong\u003e: 4 inches diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hot Dip Galvanized Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: 3-Piece\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrimp Supplied\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplicable Standards\u003c\/strong\u003e: ACCA, SMACNA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SOUTHWARK METAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 58_5X4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51283895419186,"sku":"58_5X4","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309277433.jpg?v=1781062623","url":"https:\/\/voomisupply.com\/products\/southwark-metal-58_5x4-pipe-reducer-5x4-inch-galvanized","provider":"Voomi Supply","version":"1.0","type":"link"}