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The MUELLER STREAMLINE K265860 is a 4-inch nominal DWV (drain, waste, and vent) straight double wye fitting manufactured from Schedule 40 PVC. The double wye configuration allows a single mainline pipe to branch into two lateral lines simultaneously, making it a common choice in drain system layouts where multiple fixtures tie into the same horizontal run. Hub end connections accept standard 4-inch PVC pipe with solvent cement. Domestically produced to meet standard DWV application requirements, this fitting is handled by licensed plumbers in both new construction and retrofit drain system work.
This fitting is suited for residential and light commercial DWV installations where a straight double wye junction is required on a 4-inch horizontal drain line. Typical applications include multi-fixture bathroom groups, laundry drain branches, and main building drain assemblies. The Schedule 40 wall thickness provides the durability expected in gravity-flow drain, waste, and vent systems installed to IPC and UPC plumbing code standards.
Designed as an OEM-style DWV fitting compatible with 4-inch nominal Schedule 40 PVC drain, waste, and vent piping systems installed per IPC or UPC plumbing code requirements.
Installation is performed by a licensed plumber following applicable local plumbing code, IPC, or UPC requirements. All PVC hub connections require proper pipe cutting, deburring, dry-fitting, and solvent cement application in accordance with ASTM D2564 procedures. Verify correct flow direction and grade on all horizontal drain runs before cementing joints. This fitting is intended for gravity-flow DWV service only and is not rated for pressure applications.
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