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The NAPCO g104 is a gasketed SDR 35 PVC tee fitting engineered for non-pressure sewer and surface water drainage systems. Molded from PVC and rated to SDR 35 standards, this tee provides a three-way, 4-inch connection for mainline and branch sewer runs. The fitting features a double-seal locked-in rubber gasket that creates a leak-proof joint without solvent cement, making field installation faster and more reliable. Reinforced branches and intersections are built into the design to maintain structural integrity under soil load and typical buried-service conditions. Licensed plumbers and sewer contractors are the primary installers.
The g104 is used in residential and light commercial gravity-flow sewer installations where SDR 35 gasketed pipe and fittings are specified. It connects to 4-inch SDR 35 sewer mains and branch lines, handling both sanitary sewer and surface water drainage applications. The gasketed joint system is well suited for direct-bury installations where ground movement or thermal cycling may stress rigid cemented joints.
Designed as an OEM-style replacement and new-installation fitting for 4-inch SDR 35 gasketed PVC sewer pipe systems in non-pressure gravity drainage applications.
Installation should be performed by a licensed plumber in accordance with the International Plumbing Code and applicable local codes for buried sewer systems. Shut off flow and isolate the line segment before cutting in the fitting. Ensure the gasket is properly seated and lubricated per manufacturer guidance before pushing pipe home. Do not use solvent cement on gasketed joints, and verify trench bedding meets code requirements for SDR 35 pipe support.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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