Reducing Tee, Slip x Slip x Slip PVC Schedule 40 1" x 3/4" x 1" (401-126)

This 1" × 3/4" Schedule 40 PVC Reducing Tee provides a reducing solvent-cemented branch outlet off a 1" PVC main run, with equal 1" slip socket run ports maintaining the straight-through flow path of the main and a reducing 3/4" slip socket branch outlet providing a smaller-capacity perpendicular branch connection. All three ends accept their respective PVC pipe sizes for solvent cement joining. The run continues at the full 1" diameter through both run ports — the size reduction occurs only at the branch, not at the run.

The reducing tee is the correct branch fitting wherever the branch requires less flow capacity than the main run. This is the defining selection criterion that distinguishes the 401-126 from the equal tee: when the branch must carry the same capacity as the 1" run, a 1" equal tee is the correct selection. When the branch feeds a 3/4" secondary run, zone supply line, equipment connection, or instrument supply branch where the full 1" pipe diameter would exceed the branch flow requirement, the 401-126 provides the 1" run continuity with a built-in 3/4" branch in a single fitting — eliminating the need for a full-size 1" equal tee plus a downstream 3/4" reducing bushing or reducer coupling at the branch position to achieve the same result.

The 401-126 must also be distinguished from the 401-124 (1" × 3/4" × 1/2", previously written), which has a superficially similar size notation but is a fundamentally different fitting configuration. The 401-124 has three different socket sizes — its run ports are not equal, because the run inlet is 1" and the run outlet is 3/4", with the run itself changing size through the tee body. The 401-126 has equal 1" run ports — both run sockets are 1", the run diameter does not change through the tee, and only the branch is reduced to 3/4". A buyer who needs the run to continue at 1" diameter while branching at 3/4" needs the 401-126. A buyer who needs the run itself to step down from 1" to 3/4" while simultaneously branching at 1/2" needs the 401-124.

The 401-126 is the Schedule 40 counterpart to the Schedule 80 801-131 (1" × 1" × 3/4" reducing tee, previously written). Both serve the identical function — equal 1" run ports with a reducing 3/4" branch — in the same all-socket, all-solvent-cement configuration. The distinction is schedule: the 801-131 serves Schedule 80 systems in dark gray PVC at the higher Schedule 80 pressure rating; the 401-126 serves Schedule 40 systems in white PVC where the Schedule 40 construction and pressure rating are appropriate. Using a Schedule 40 reducing tee in a Schedule 40 system preserves pressure rating consistency at the branch tee position.

The 1" × 3/4" reducing combination is one of the most common branch size transitions in residential and commercial Schedule 40 systems. The 1" pipe size serves primary headers, distribution mains, and equipment supply connections throughout residential irrigation, pool and spa, commercial plumbing, and light industrial systems. The 3/4" pipe size serves branch supply lines, secondary zone connections, equipment feeds, and secondary distribution runs that draw from those 1" primary mains. Wherever a 1" run must tap off a 3/4" branch in a Schedule 40 system, the 401-126 is the most direct single-fitting solution.

The governing-end pressure rating of the 401-126 follows the standard reducing tee convention: the larger end governs. Both 1" run ports carry the lower pressure rating and govern the assembly at approximately 450 psi at 73°F. The 3/4" branch socket would independently support a higher pressure at that bore size, but the assembly rating is set by the governing 1" run ends — the same governing-end logic applied consistently across all reducing tees in this catalog.

Manufactured in white Schedule 40 PVC, this tee delivers reliable performance across residential, commercial, and light industrial piping applications. PVC's resistance to acids, bases, salts, chlorine, and common process fluids provides long service life where metal tees would corrode, scale, or introduce contamination. NSF/ANSI 61 and NSF/ANSI 14 listings confirm suitability for potable water contact.

Rated to 450 psi at 73°F, this fitting handles standard pressure service across irrigation, pool and spa, commercial plumbing, water treatment, and light industrial applications at 1". Three separate solvent-cemented joints must be made at installation. Clean and dry each pipe end and socket interior before application. Apply purple PVC primer to all mating surfaces — both 1" run port sockets, the 3/4" branch socket, and all three corresponding pipe ends. Apply a uniform coat of Schedule 40 PVC solvent cement to both the pipe end and socket interior at each joint before inserting. Insert each pipe with a slight quarter-turn twist and hold firmly for 30 seconds. Confirm that the 1" pipe ends are aligned to the 1" run port sockets and the 3/4" pipe end is aligned to the branch socket before cementing — the socket sizes are visually distinct but confirming correct alignment before the first joint is good practice. Stagger the three joints where possible and allow full cure time per the cement manufacturer's guidelines before pressurizing. Apply published pressure derating factors for service temperatures above 73°F.

Specifications:

Industries & Applications:

• Commercial & Residential Irrigation — Taps a reducing 3/4" branch off a 1" solvent-cemented Schedule 40 PVC lateral or submain at zone supply splits, secondary lateral takeoffs, filter station branch connections, and distribution tee positions in residential and commercial irrigation systems where the branch must carry 3/4" zone supply capacity while the 1" main run continues through the tee at full diameter — the defining high-frequency application for the 1" × 3/4" Schedule 40 reducing tee across residential and commercial irrigation installations
• Pool, Spa & Aquaculture — Provides a 3/4" reducing branch off a 1" solvent-cemented Schedule 40 PVC recirculation main, equipment header, or supply distribution run at equipment supply branch points, secondary recirculation branches, and parallel circuit distribution positions in residential and commercial pool, spa, and aquatic facility installations where the 3/4" branch serves a secondary equipment supply or distribution function while the 1" run continues at full diameter
• Commercial Plumbing — Branches a 3/4" supply line off a 1" solvent-welded Schedule 40 PVC water supply main at fixture supply branches, equipment feed connections, secondary zone supply takeoffs, and manifold distribution branch positions in commercial building water distribution systems where the 3/4" branch serves a secondary supply function while the 1" primary run continues through the tee
• Pump Station & Equipment Supply Routing — Provides a 3/4" reducing branch off a 1" Schedule 40 PVC pump discharge header, equipment supply run, or secondary distribution main at branch supply positions in residential and commercial pump station assemblies and mechanical equipment supply systems where the branch requires 3/4" capacity and the 1" run continues to serve additional downstream connections
• Water & Wastewater Treatment — Taps a 3/4" reducing branch off a 1" Schedule 40 PVC secondary distribution header at equipment supply branch points, zone supply takeoffs, and secondary distribution branches in light-duty municipal and industrial water treatment facilities where the 3/4" branch serves a secondary distribution or equipment supply function while the 1" run continues at full diameter through the tee
• Light Industrial Process Piping — Provides a 3/4" reducing branch off a 1" solvent-welded Schedule 40 PVC process distribution header at parallel equipment supply splits, secondary process branch positions, and zone supply takeoffs in light industrial and chemical handling systems where the Schedule 40 pressure rating is appropriate and the 3/4" branch serves a secondary process supply function off the 1" primary header
• Gravity Drain & DWV Systems — Provides a 3/4" reducing branch off a 1" Schedule 40 PVC drain collection main at fixture drain branch connection points and secondary collection branches in residential and commercial building drain systems where the 3/4" branch serves fixture or secondary drain collection functions while the 1" collection main continues through the tee at full capacity