Reducing Tee, Slip x Slip x Slip PVC Schedule 40 3/4" x 1/2" x 3/4" (401-101)

This 3/4" x 1/2" x 3/4" Schedule 40 PVC Run-Reducing Tee (Slip x Slip x Slip) provides a three-way all solvent-cement junction that simultaneously reduces the inline run diameter from 3/4" to 1/2" and maintains a full-size 3/4" perpendicular branch departure in a single compact all-socket fitting body. Constructed in white Schedule 40 PVC, it serves the specialized application where a 3/4" socket mainline or distribution run must be simultaneously tapped with a full-size 3/4" branch departure while the continuing inline run downstream of the tee steps down to 1/2" — combining three distinct functions (inline run continuation, inline size reduction, and full-size branch departure) in a single fitting that no standard equal-run tee, standard reducing tee, or standard bushing can replicate in a single body.

The 3/4" slip socket run inlet accepts 3/4" PVC pipe for a permanent solvent-cement bond from the upstream mainline or distribution run. The 1/2" slip socket run outlet accepts 1/2" PVC pipe for a permanent solvent-cement bond continuing the reduced-diameter inline run downstream — stepping the inline diameter down from 3/4" to 1/2" immediately at the tee body without requiring a separate reducer bushing or coupling downstream of a standard full-size tee. The 3/4" slip socket branch outlet accepts 3/4" PVC pipe for a permanent solvent-cement bond perpendicular to the run, providing a full-size 3/4" branch departure that matches the upstream run inlet diameter. This run-reducing configuration is the correct choice when three conditions must be simultaneously satisfied at the same tee location: a 3/4" socket run upstream, a 3/4" socket branch departure at the tee, and a continuing 1/2" socket pipe run downstream of the tee — the specific assembly geometry that requires the run-reducing tee rather than any of the more common tee configurations. It should not be confused with the 401-095 (3/4" x 3/4" x 1/2" standard reducing tee, confirmed in this catalog session), which maintains equal 3/4" run ends throughout and reduces only the branch to 1/2" — 401-095 is correct when the branch steps down to 1/2" while the inline run remains 3/4" on both sides; 401-101 is correct when the inline run itself must step down from 3/4" to 1/2" while the branch departs at full 3/4" size at the same tee location. The run-reducing tee configuration eliminates a separate reducer bushing or coupling on the downstream run leg that would otherwise be required after a standard full-size 3/4" tee — most commonly encountered in residential and light commercial irrigation grid assemblies where a 3/4" distribution mainline must simultaneously supply a full-size 3/4" zone valve or filter housing branch while the continuing grid run downstream steps down to a 1/2" small-bore lateral; in drip system distribution layouts where a 3/4" header must simultaneously feed a 3/4" zone supply branch and continue at 1/2" downstream; and in commercial plumbing distribution assemblies where a 3/4" socket main must simultaneously serve a full-size 3/4" branch connection while the continuing run downstream transitions to a 1/2" small-bore service or fixture supply run.

Rated to approximately 480 psi at 73°F (governed by the 3/4" run inlet and 3/4" branch ends), this tee is suited for standard commercial and light industrial pressure service. NSF/ANSI 61 listing confirms suitability for potable water contact.

Apply solvent cement to both the pipe end and fitting socket at each port per ASTM D2564 procedures, using a primer appropriate for the pipe and fitting schedule. Insert pipe fully into each socket and maintain a quarter-turn during assembly. Note that the run outlet (1/2") is smaller than both the run inlet (3/4") and branch outlet (3/4") — confirm pipe diameters at each port before cementing to avoid inserting the incorrect pipe size. Plan the branch outlet direction and the downstream run alignment before cementing the run inlet joint — all three cemented joints establish permanent alignments that cannot be adjusted after cure. Allow adequate cure time before pressurizing, and derate pressure ratings for elevated temperatures per published derating curves.

Specifications:

Industries & Applications:

• Irrigation & Water Distribution — Simultaneously taps a full-size 3/4" branch departure for a zone valve, filter housing, or solenoid valve supply connection while reducing the continuing inline run to 1/2" in a single fitting at 3/4" all-socket distribution mainlines in residential and light commercial irrigation systems — eliminating a separate reducer coupling or spigot bushing on the downstream run leg that a standard full-size 3/4" tee would require to achieve the same inline size reduction downstream of the branch tap
• Drip & Micro-Irrigation Systems — Provides the standard single-fitting three-way junction where a 3/4" socket distribution header must simultaneously supply a 3/4" zone valve or filter assembly branch while the continuing header run steps down to 1/2" for a small-bore drip emitter supply lateral or micro-irrigation sub-header — combining the branch departure and inline reduction in the most compact possible single fitting body at the dominant residential drip system header diameter
• Commercial Plumbing — Simultaneously serves a full-size 3/4" branch connection for a fixture group, equipment supply, or service valve body while reducing the continuing inline run to 1/2" for a dedicated small-bore fixture or equipment supply run downstream in commercial building water distribution systems where the branch departure and inline reduction must both occur at the same tee location
• Industrial Process Piping — Provides a simultaneous full-size 3/4" branch departure for an instrument, valve, or service component and a reduced 1/2" continuing run for a downstream small-bore process distribution or service line in water treatment, chemical processing, and manufacturing facilities where the run-reducing tee eliminates a separate reducer fitting on the downstream run leg at the branch tap location
• Water Treatment & Aquaculture — Used at inline distribution header tap points where a full-size 3/4" branch departure for a filter, dosing connection, or treatment component must occur simultaneously with a 3/4" to 1/2" inline run reduction for the downstream distribution continuation with NSF/ANSI 61 compliance required throughout the all-cemented assembly
• Chemical Handling — Delivers a corrosion-resistant simultaneous 3/4" full-size branch departure and 3/4" to 1/2" inline run reduction at distribution manifold tap points in systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings where combining the branch tap and inline reduction in a single cemented fitting body minimizes joint count and leak risk at the distribution header tap location