{"product_id":"southwark-metal-att_4in-duct-takeoff-4-inch-air-tite","title":"Southwark Metal ATT_4IN Duct Takeoff 4 Inch Air-tite","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SOUTHWARK METAL ATT_4IN is a 4-inch diameter Air-Tite sheet metal duct takeoff fabricated from hot-dip galvanized steel. Duct takeoffs connect branch ducts to a main trunk line, directing conditioned air from the plenum or trunk to individual zones or rooms. This fitting meets ACCA and SMACNA standards, making it a code-recognized component for residential and light commercial forced-air distribution systems. HVAC installers and sheet metal contractors use this fitting when building or retrofitting ductwork that requires a tight, low-leakage branch connection. The galvanized steel construction resists corrosion in typical attic, basement, and crawl space environments.\u003c\/p\u003e\u003cp\u003eThe ATT_4IN is suited for forced-air heating and cooling duct systems where a 4-inch branch takeoff is required. The Air-Tite design provides a tighter fit at the trunk connection point, reducing air leakage at the branch junction. This fitting is commonly installed in residential new construction and retrofit projects, as well as light commercial applications where SMACNA-compliant ductwork fabrication and installation practices are followed.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-inch diameter branch opening for standard round duct connections\u003c\/li\u003e\n\u003cli\u003eAir-Tite design reduces air leakage at the trunk line connection\u003c\/li\u003e\n\u003cli\u003eHot-dip galvanized steel construction for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eMeets ACCA and SMACNA applicable standards\u003c\/li\u003e\n\u003cli\u003eSuitable for residential and light commercial forced-air duct systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting for 4-inch branch connections in residential and light commercial sheet metal duct systems fabricated to SMACNA standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician or qualified sheet metal contractor. Shut down the air handling unit and confirm the system is depressurized before cutting into the trunk line or plenum. Seal all connections with mastic sealant or UL 181-listed tape per SMACNA and local mechanical code requirements. Sheet metal snips, hole saws, and hand seamers are typical tools for this fitting installation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Air-Tite Duct Takeoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hot-Dip Galvanized Steel\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: ATT_4IN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOUTHWARK METAL","offers":[{"title":"Default Title","offer_id":51284163395890,"sku":"ATT_4IN","price":15.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309278209.jpg?v=1781070215","url":"https:\/\/voomisupply.com\/products\/southwark-metal-att_4in-duct-takeoff-4-inch-air-tite","provider":"Voomi Supply","version":"1.0","type":"link"}