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The WESTLAKE PIPE FITTINGS g308-4 is an 8-inch by 4-inch SDR 35 PVC gasketed sewer wye fitting designed for gravity-flow sewer and drain applications. Constructed from PVC with a gasketed connection on all ports, this wye allows a 4-inch branch line to tie into an 8-inch main sewer line without solvent welding, making field assembly faster and more forgiving in wet or confined conditions. At 9 pounds, it is manageable for a single installer during underground placement. Licensed plumbers and sewer contractors are the primary installers for this type of fitting in both new construction and rehabilitation work.
This fitting is suited for residential and light commercial gravity sewer systems installed underground. It is commonly used at cleanout or lateral connection points where a smaller branch must intersect a larger main trunk line. The SDR 35 wall thickness rating meets the load requirements for typical burial depths in standard soil conditions. Contractors working on municipal tie-ins, subdivisions, or site utility work will encounter this configuration regularly.
Designed as an OEM-style replacement and standard-fit component for SDR 35 PVC gasketed sewer piping systems using 8-inch main lines with 4-inch branch laterals.
Installation should be performed by a licensed plumber or qualified sewer contractor in accordance with local plumbing codes and ASTM D3034 pipe and fitting standards. Ensure the trench is properly bedded with approved granular material before seating the fitting to prevent point loading on the bell or gasket seats. Inspect gaskets for cuts, debris, or misalignment before making each joint, and lubricate gaskets with an approved pipe lubricant only. Do not use solvent cement on gasketed SDR 35 joints.
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