Reducing Tee, Slip x Slip x Slip PVC Schedule 40 1-1/4" x 1-1/4" x 3/4" (401-167)

This 1-1/4" × 3/4" Schedule 40 PVC Reducing Tee provides a reducing solvent-cemented branch outlet off a 1-1/4" PVC main run, with equal 1-1/4" 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 1-1/4" diameter through both run ports — the two-step size reduction occurs only at the branch, not at the run.

The 401-167 is the correct branch fitting wherever a 3/4" branch is required off a 1-1/4" main run in a fully solvent-welded Schedule 40 system. Two steps separate the 1-1/4" run size from the 3/4" branch size, making this a moderate branch reduction that serves the well-defined secondary supply niche where 3/4" branch capacity is appropriate for a downstream zone, equipment connection, or secondary distribution run drawing from a 1-1/4" transitional-size primary. When the branch must carry the full 1-1/4" capacity of the run, an equal 1-1/4" tee is the correct selection. When the branch requires a smaller 3/4" outlet, the 401-167 provides that reduction at the tee body without requiring a separate reducer at the branch position.

The 401-167 should be distinguished from the 401-126 (1" × 1" × 3/4", previously written) — the most closely related reducing tee in the 401-series. Both feature equal run ports with a reducing 3/4" branch; the run port size is the sole distinction. The 401-126 serves 1" primary runs stepping down to a 3/4" branch in a one-step reduction. The 401-167 serves 1-1/4" primary runs stepping down to the same 3/4" branch in a two-step reduction. The correct selection depends entirely on the run pipe size: 1-1/4" run pipe calls for the 401-167; 1" run pipe calls for the 401-126. Both fittings deliver the same 3/4" branch outlet socket downstream.

The 1-1/4" run context places the 401-167 in the transitional pipe size tier that has been established across multiple 1-1/4" entries throughout this catalog. The 1-1/4" pipe size bridges the hydraulic gap between 1" and 1-1/2" in Schedule 40 distribution hierarchies — appearing at pump suction and discharge piping, secondary distribution header runs, equipment supply connections, and transitional branch mains in commercial and residential systems. The 3/4" branch off this 1-1/4" transitional run serves zone supply laterals, secondary distribution branches, small equipment feeds, and secondary zone connections where the 3/4" pipe diameter is appropriate for the downstream flow requirement. The 401-167 is the direct, single-fitting solution at every position in a 1-1/4" Schedule 40 system where a 3/4" branch is required.

The governing-end pressure rating follows the standard reducing tee convention: the larger 1-1/4" run ports govern the assembly at approximately 280 psi at 73°F. The 3/4" branch socket would independently support a higher pressure at that bore size, but the assembly is governed by the larger run ends throughout — consistent with the governing-end logic applied 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 or scale. NSF/ANSI 61 and NSF/ANSI 14 listings confirm suitability for potable water contact.

Rated to 280 psi at 73°F (governed by the 1-1/4" run port sockets), this fitting handles standard pressure service across irrigation, pool and spa, commercial plumbing, water treatment, and light industrial applications. 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 1-1/4" 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 the correct pipe size is aligned to each socket before cementing — the 1-1/4" run port sockets and the 3/4" branch socket are visually distinct; confirm which socket faces the branch direction before applying primer. 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 1-1/4" solvent-cemented Schedule 40 PVC secondary lateral or transitional-size submain at zone supply splits, secondary lateral takeoffs, filter station branch connections, and distribution tee positions in residential and commercial irrigation systems where the 1-1/4" transitional run supplies a 3/4" zone lateral or secondary supply branch while the 1-1/4" main run continues through the tee at full capacity
• Pump Station & Secondary Distribution — Provides a 3/4" reducing branch off a 1-1/4" solvent-cemented Schedule 40 PVC pump discharge secondary header, equipment supply run, or transitional distribution main at branch supply positions in residential and commercial pump station assemblies and mechanical equipment supply systems where the 3/4" branch serves a secondary supply or zone feed function drawing from the 1-1/4" transitional primary run
• Pool, Spa & Aquaculture — Branches a 3/4" supply line off a 1-1/4" solvent-welded Schedule 40 PVC equipment supply or secondary recirculation run at equipment supply branch points, secondary circuit splits, and parallel distribution positions in residential and commercial pool, spa, and aquatic facility installations where the 3/4" branch serves a secondary equipment supply function off the 1-1/4" transitional distribution run
• Commercial Plumbing — Provides a 3/4" reducing branch off a 1-1/4" solvent-welded Schedule 40 PVC secondary water supply header at fixture supply branches, equipment feed connections, and secondary zone supply takeoffs in commercial building water distribution and mechanical room systems where the 3/4" branch serves a secondary fixture supply or equipment feed function off the 1-1/4" transitional header
• Water & Wastewater Treatment — Taps a 3/4" reducing branch off a 1-1/4" 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 off the 1-1/4" transitional run
• Light Industrial Process Piping — Provides a 3/4" reducing branch off a 1-1/4" solvent-welded Schedule 40 PVC process distribution header at parallel equipment supply splits, secondary process branch positions, and zone supply takeoffs in light industrial Schedule 40 systems where the 3/4" branch serves a secondary process supply function off the 1-1/4" transitional primary header
• Secondary Header Branch Supply — Delivers a 3/4" reducing branch off a 1-1/4" Schedule 40 PVC transitional-size secondary header at zone supply and equipment connection branch positions across all Schedule 40 system types where the 1-1/4" transitional pipe size bridges the gap between 1" and 1-1/2" in the distribution hierarchy and the 3/4" branch serves the downstream zone or equipment supply flow requirement