Reducing Tee, Slip x Slip x FPT PVC Schedule 40 4" x 4" x 1" (402-417)

The 402-417 is a PVC Schedule 40 reducing tee with a 4" slip (socket) run and a 1" female pipe thread (FPT) branch outlet. The two 4" run ports accept solvent cement welding per ASTM D2564 for a permanent, pressure-rated inline connection, while the 1" FPT branch provides a threaded takeoff point compatible with any standard 1" NPT male-threaded fitting, valve, gauge, or instrument — no solvent welding required at the branch.

Manufactured from rigid PVC compound conforming to ASTM D1784 cell classification requirements, this fitting delivers the corrosion resistance, chemical compatibility, and long service life associated with Schedule 40 PVC across a wide range of commercial, industrial, and municipal piping systems. The Schedule 40 wall thickness provides reliable pressure-rated performance for both pressurized distribution systems and gravity-flow applications.

The 402-417 occupies a well-defined position within the 4" x 4" FPT reducing tee series — the 1" FPT branch is large enough to handle dedicated service connections, small zone valves, and chemical injection lines carrying real flow volumes, yet small enough relative to the 4" mainline to function clearly as a controlled tap rather than a primary branch. This distinguishes it from the near-instrumentation-scale 3/4" branch of the 402-416 on one end, and the mid-flow 2" branch of the 402-420 on the other. The 1" branch is a common and practical size in irrigation, municipal, and industrial applications where a 4" header must be tapped for individual zone feeds, chemical dosing lines, pressure relief connections, or low-to-moderate flow service branches. The FPT outlet remains serviceable throughout the life of the system — valves, meters, and threaded fittings at the branch can be removed and replaced without disturbing the permanent solvent-welded mainline.

Specifications:

Industries & Applications:

• Irrigation & Agriculture — Individual zone valve connections and low-to-moderate flow service taps off 4" mainline headers in large-scale pressurized irrigation systems where the branch feeds a dedicated zone or lateral circuit
• Municipal Water & Wastewater — Service taps, pressure monitoring ports, and low-flow branch connections off 4" distribution mains at pump stations and treatment facilities where a 1" threaded branch accommodates meters, gauges, or small service lines
• Industrial Process Piping — Threaded branch taps off 4" process fluid and cooling water mainlines for chemical dosing injection points, pressure relief connections, sample ports, and low-flow service branches
• Commercial Plumbing — Mechanical room distribution headers where a 4" supply main requires a 1" threaded branch for dedicated service connections, hose bibb feeds, equipment drain lines, or pressure gauge ports
• Fire Suppression — Inspector test connections, drain valves, and pressure gauge taps off 4" sprinkler system mains where a 1" threaded branch provides the required service port without impacting mainline flow capacity
• Aquaculture & Water Treatment — Chemical dosing lines, sample ports, and low-flow branch taps off large-diameter supply headers in recirculating aquaculture and water treatment systems