Reducing Tee, Slip x Slip x FPT PVC Schedule 40 6" x 6" x 3" (402-530)

The 6" x 6" x 3" PVC Schedule 40 Tee (Slip x Slip x FPT) is a mixed-connection reducing tee designed for commercial and municipal PVC piping systems that require a substantial, threaded branch takeoff from a permanent 6-inch solvent-weld main run. With 6-inch slip socket connections on both run ends and a 3-inch female NPT threaded connection on the branch outlet, this fitting delivers a half-size reduction and a connection type transition in a single fitting body — the 6-inch slip run installs permanently via solvent cement, while the 3-inch FPT branch provides a threaded, serviceable connection point that accepts any standard 3-inch male NPT fitting directly without additional adapters in the branch line.

The -530 suffix places this fitting as the middle option in the 402-series 6-inch run tee line — sitting between the 402-529 (6" x 2-1/2" FPT branch) and the 402-532 (6" x 4" FPT branch) previously described. The 3-inch branch is not an intermediate compromise between those two options; it is a distinct nominal size with its own well-established application profile in commercial and municipal piping. A 3-inch FPT branch off a 6-inch main delivers meaningful flow capacity — substantially more than a 2-1/2-inch branch — while remaining a moderate, practical size for valve bodies, filter connections, and lateral takeoffs that do not require the full capacity of a 4-inch branch. In the hierarchy of branch sizes for a 6-inch main, the 3-inch branch occupies the most versatile middle ground: large enough to serve as a genuine secondary distribution lateral or a high-capacity equipment connection, compact enough to keep the downstream fitting assembly manageable in size and cost.

The most common applications for this fitting pair a 6-inch main that carries full system flow with a 3-inch branch that serves a defined downstream function requiring its own threaded interface — a gate valve or ball valve for zone isolation, a pump suction lateral, a filter housing inlet, a chemical injector header, or a secondary supply circuit. The female NPT thread on the branch accepts the male-threaded component directly: a 3-inch MPT valve, a close nipple, a union half, or any other standard 3-inch male NPT fitting threads in without additional adapters. Thread sealant should be applied to the male-threaded component per standard NPT practice prior to assembly. All run connections install via PVC solvent cement per standard procedure. Manufactured to ASTM D2466 standards and compatible with Schedule 40 PVC pipe on the run ends and standard NPT threaded fittings on the branch.

Specifications:

Industries & Applications:

• Large-Scale Irrigation & Agricultural Systems — The most common commercial application; used in 6-inch irrigation mainlines where a 3-inch FPT branch provides a threaded connection for a zone valve body, filter housing inlet, pressure regulator assembly, or submain lateral requiring a full-size threaded interface for installation and routine maintenance without disturbing the permanently cemented 6-inch main on either side
• Municipal Water Distribution — Specified in 6-inch municipal distribution mains where a 3-inch threaded branch provides a service connection for a hydrant lateral, isolation valve, meter assembly, or major service tap requiring a 3-inch threaded interface at the branch point — a common configuration in municipal water systems where threaded branch connections at valved takeoffs are standard practice for inspection and serviceability compliance
• Pump Suction & Discharge Headers — Incorporated in pump system assemblies where a 3-inch FPT branch on a 6-inch main provides a threaded pump suction connection, recirculation return, or bypass lateral at a flow capacity appropriate to the downstream pump circuit — with the threaded interface allowing the pump or bypass assembly to be disconnected and serviced without disturbing the permanent 6-inch run
• Commercial Plumbing & Mechanical Systems — Applied in large commercial building water mains and mechanical room distribution headers where a 6-inch primary supply requires a 3-inch threaded branch for a secondary supply circuit, equipment inlet, booster pump connection, or fire suppression lateral requiring a threaded interface for testing, maintenance, and periodic inspection
• Water & Wastewater Treatment — Used in treatment plant distribution piping where 6-inch Schedule 40 mains require a 3-inch threaded branch for filter connections, chemical dosing headers, recirculation laterals, or secondary distribution to equipment clusters — where the 3-inch branch delivers more flow capacity than a 2-1/2-inch connection while keeping the branch assembly compact relative to a full 4-inch branch outlet
• Swimming Pool & Aquatics Infrastructure — Specified in 6-inch primary recirculation mains at large commercial aquatic facilities where a 3-inch FPT branch provides a threaded connection for a filter inlet, backwash line, chemical feeder supply, or secondary circulation circuit requiring periodic access for cleaning, element replacement, and seasonal maintenance without cutting the primary 6-inch recirculation main