{"product_id":"ay-mcdonald-4423-390-pex-a-poly-insert-tee","title":"Ay Mcdonald 4423-390 Pex-a Poly Insert Tee","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe AY MCDONALD 4423-390 is a PEX-A poly insert tee fitting used to create branch connections in PEX-A tubing systems. With a 0.5-inch by 0.5-inch by 0.75-inch configuration, this tee allows a run line to continue at the same diameter while expanding the branch outlet to 0.75 inches. The poly insert design is compatible with PEX-A expansion-style installations and provides a corrosion-resistant alternative to brass fittings. Plumbers and pipefitters use this type of fitting in residential and light commercial water distribution, radiant heating, and hydronic systems.\u003c\/p\u003e\u003cp\u003eThis fitting is suited for installations where a PEX-A main line needs to be teed off with a larger-diameter branch, a common configuration in domestic hot and cold water supply runs. The insert-style design seats inside the PEX-A tubing and is typically secured using a PEX expansion tool and expansion rings rather than crimp rings. It is appropriate for in-wall, under-slab, and mechanical room applications where a durable, non-metallic fitting is preferred.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePoly insert construction resists corrosion and scale buildup in water distribution systems\u003c\/li\u003e\n\u003cli\u003e0.5 x 0.5 x 0.75 inch reducing tee configuration allows branch upsizing without additional reducers\u003c\/li\u003e\n\u003cli\u003eDesigned for use with PEX-A tubing and the expansion-style connection method\u003c\/li\u003e\n\u003cli\u003eLightweight polymer body suitable for concealed and mechanical room installations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and new-installation fitting for PEX-A tubing systems using the expansion connection method.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed plumber in accordance with local plumbing codes and the IPC. Shut off the water supply and depressurize the line before cutting into existing tubing. Use a calibrated PEX expansion tool sized to the tubing diameter when seating expansion rings. Do not use this fitting with PEX-B or PEX-C tubing without verifying manufacturer compatibility, as insert dimensions and connection methods differ.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Size 1\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Size 2\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Size 3 (Branch)\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting Type\u003c\/strong\u003e: Insert Tee\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Poly (Polymer)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Tubing Type\u003c\/strong\u003e: PEX-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder Increment\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: AY MCDONALD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4423-390\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AY MCDONALD","offers":[{"title":"Default Title","offer_id":51396348018994,"sku":"4423-390","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312834230.jpg?v=1782829890","url":"https:\/\/voomisupply.com\/products\/ay-mcdonald-4423-390-pex-a-poly-insert-tee","provider":"Voomi Supply","version":"1.0","type":"link"}