Reducing Tee, Slip x Slip x Slip PVC Schedule 80 4" x 1-1/2" (801-419)

The 4" x 1-1/2" PVC Schedule 80 Reducing Tee (Part No. 801-419) is a pressure-rated, gray-body fitting designed to introduce a 1-1/2" branch connection off a 4" Schedule 80 PVC main line. The two run ports maintain the full 4" bore for straight-through flow continuity, while the branch port steps down to 1-1/2" — all three ports accepting solvent-cement joints in a slip (socket) configuration, producing a rigid, leak-resistant assembly suited to the elevated pressures and chemically demanding environments where Schedule 80 is the specified standard.

The two-and-a-half-nominal-size step-down from 4" to 1-1/2" positions this tee at a specific point in the 4" Schedule 80 reducing tee series — below the 801-420 (4" × 2" branch) and immediately above the 801-418 (4" × 1-1/4" branch) — reflecting a branch circuit requirement that falls between the moderate-capacity 2" branch and the smaller 1-1/4" instrumentation-scale outlet. The 1-1/2" branch is a well-established standard connection size in industrial and commercial PVC systems, compatible with a broad range of downstream Schedule 80 components including 1-1/2" ball valves, unions, check valves, strainers, and equipment ports that use 1-1/2" as their standard inlet or outlet size.

This size combination is most frequently specified in industrial process loops, chemical processing systems, and commercial mechanical rooms where a 4" pressure header or supply main must deliver a defined secondary flow to a 1-1/2" branch circuit without a downstream reducing fitting on the branch outlet. The 1-1/2" branch at this junction commonly serves pump bypass lines, chemical feed connections, equipment supply inlets, zone isolation valve assemblies, and secondary distribution circuits where 1-1/2" is the standard pipe size for the connected equipment or sub-system.

The 801-419 occupies a practical position in the series precisely because 1-1/2" is such a common industrial and commercial equipment connection size. Specifying a reducing tee with a 1-1/2" branch outlet eliminates the need for a same-size 4" tee paired with a downstream 4" × 1-1/2" reducer or multi-bushing stack on the branch — consolidating the branch connection and the full reduction into a single fitting, reducing joint count, shortening the branch outlet assembly, and simplifying installation at a junction point where Schedule 80 joint integrity is an active design priority.

Manufactured from Type I, Grade I PVC compound, this fitting conforms to ASTM D2467 dimensional standards and delivers the wall thickness and pressure ratings that define Schedule 80 over Schedule 40. Compatible with Schedule 80 PVC pipe and solvent cements conforming to ASTM D2564.

Specifications:

Industries & Applications:

• Industrial & Chemical Processing — Branch connections from 4" chemical-resistant pressure mains to 1-1/2" secondary circuits, chemical feed lines, pump bypass connections, and equipment supply inlets where 1-1/2" is the standard interface size for the connected process component
• Municipal Water & Wastewater — Junction fittings on 4" distribution or collection mains where a 1-1/2" service connection, equipment supply, or metering tap must be introduced at a defined branch point without reducing the primary 4" run diameter
• Commercial Plumbing — Mechanical room branch connections on Schedule 80 systems where a 4" supply main steps down to a 1-1/2" equipment inlet, zone isolation assembly, or secondary circuit header at a single compact junction fitting
• Irrigation — Branch connections on pressurized 4" irrigation mains where a 1-1/2" zone entry valve, lateral feed, or equipment supply connection is required at a junction point without downstream reducing hardware on the branch outlet
• Mining & Oil Field — Corrosive fluid handling systems requiring a durable, chemical-resistant branch reduction from a 4" pressure main to a 1-1/2" secondary circuit, equipment connection, or sampling assembly
• Power Generation & Utilities — Cooling water and process fluid systems where a 4" supply main branches to a 1-1/2" bypass circuit, equipment supply, or secondary distribution run at pump headers or system manifold locations
• Aquaculture & Water Treatment — Recirculating system headers where a 4" main branches to a 1-1/2" lateral circuit supplying individual filter units, dosing equipment, UV treatment systems, or aeration components with a defined moderate flow requirement