Reducing Tee, Slip x Slip x Slip PVC Schedule 80 1" x 1" x 3/4" (801-131)

This 1" × 3/4" Schedule 80 PVC Reducing Tee provides a reducing solvent-cemented branch outlet off a 1" PVC main run, with 1" slip socket run ports and a reducing 3/4" slip socket branch outlet — all three ends accepting their respective PVC pipe sizes for solvent cement joining. The two 1" run ports maintain the full-size straight-through flow path of the main run, while the 3/4" branch outlet presents a reduced-diameter socket perpendicular to the run for a smaller-capacity branch supply line, secondary distribution run, or equipment feed connection.

The reducing tee is the correct branch fitting wherever the branch requires less flow capacity than the main run — the single most important selection criterion distinguishing the 801-131 from its equal-tee counterpart, the 801-010 (1" × 1" × 1" equal tee, previously written). When the branch must carry the same capacity as the 1" run, the 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 801-131 reducing tee is the direct solution — providing the 1" run continuity with a built-in 3/4" branch in a single fitting that eliminates the need for a full-size 1" equal tee plus a downstream 3/4" reducing bushing or reducer coupling at the branch position.

The 1" × 3/4" reducing tee configuration is one of the most common reducing tee size combinations in commercial and industrial Schedule 80 systems. The 1" pipe size serves primary process headers, water distribution mains, equipment supply connections, and secondary distribution runs throughout industrial and commercial facilities; the 3/4" pipe size serves the next tier of branch supply lines, equipment feeds, and secondary zone connections that draw from those 1" headers. The branch point where a 1" run must tap off a 3/4" branch is a routine design feature in any system where the distribution hierarchy steps down from a 1" header to 3/4" branch supply lines — and the 801-131 accommodates that transition at the tee body itself without additional fittings at the branch entry.

Positioning the 801-131 within the broader 1" Schedule 80 tee family requires understanding all three tee series available at this run size. The 801-010 equal tee serves branches requiring the full 1" capacity. The 801-131 reducing tee serves branches sized at 3/4" — the adjacent smaller pipe size. The 802-130 Slip × Slip × FPT tee (previously written) serves branches requiring a female-threaded outlet rather than a solvent-cemented socket at the branch connection. When the branch requires a 3/4" solvent-cemented pipe connection off a 1" run, the 801-131 is the correct and most direct fitting selection.

The governing-end pressure rating of the 801-131 follows the standard reducing fitting convention: the larger end governs. At this tee, the 1" run ports carry the lower pressure rating and govern the assembly at approximately 450 psi @ 73°F — the same rating as the 1" equal tee 801-010. 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 end. This means the 801-131 does not represent a pressure penalty at the branch connection relative to the equal tee; the full 1" Schedule 80 system pressure rating is maintained through the tee body.

Manufactured in dark gray Schedule 80 PVC, this tee delivers the increased wall thickness and mechanical strength required in industrial, chemical, and commercial pressure piping where Schedule 40 ratings are insufficient. PVC's broad chemical resistance covers acids, bases, salts, chlorine, and most common process fluids, providing long service life in corrosive environments where metal tees would corrode, scale, or degrade over time. NSF/ANSI 61 listing confirms suitability for potable water contact.

Rated to 450 psi at 73°F, this tee handles standard to elevated pressure service across a wide range of fluid handling applications. Three separate solvent-cemented joints must be made at installation. For all three joints, clean and dry each pipe end and socket interior before application. Apply purple PVC primer to all mating surfaces — both 1" pipe ends and both 1" run port socket interiors; the 3/4" branch pipe end and the 3/4" branch socket interior. Apply a uniform coat of Schedule 80 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. Note that the 1" and 3/4" socket ends require different pipe sizes — confirm the correct pipe is aligned to each socket before cementing. Stagger the three joints where possible and allow full cure time per the cement manufacturer's temperature and humidity guidelines before pressurizing. Apply published pressure derating factors for service temperatures above 73°F.

Specifications:

Industries & Applications:

• Industrial Process Piping — Taps a 3/4" solvent-cemented secondary branch off a 1" Schedule 80 PVC process header at parallel equipment feed splits, instrument supply branch takeoffs, chemical dosing secondary distribution points, and zone supply connections in chemical processing, water treatment, and manufacturing facility piping where the branch requires 3/4" capacity rather than the full 1" run diameter — eliminating the need for an equal 1" tee plus a separate downstream reducer at the branch position
• Commercial Plumbing — Branches a 3/4" supply line off a 1" Schedule 80 PVC water distribution main at fixture supply branches, equipment feed connections, secondary zone supply takeoffs, and manifold branch positions in mechanical room and building water distribution systems requiring Schedule 80 pressure performance where the 3/4" branch capacity is appropriate for the downstream fixture or equipment supply requirement
• Water & Wastewater Treatment — Splits a 1" Schedule 80 PVC process header into a straight 1" continuation and a 3/4" secondary branch at filter vessel instrument supply connections, chemical dosing secondary distribution points, zone supply takeoffs, and parallel equipment feed splits in municipal and industrial water treatment and distribution facilities where the branch requires the reduced 3/4" pipe size
• Chemical Handling — Provides a 3/4" reducing branch point on 1" chemical feed headers, reagent distribution mains, and recirculation loop piping at secondary distribution branches, equipment supply splits, and zone supply takeoffs in systems handling acids, caustics, fertilizer solutions, and aggressive process fluids where the branch pipe size steps down from the 1" main to a 3/4" secondary run
• Irrigation & Agricultural Systems — Taps a 3/4" branch off a 1" Schedule 80 PVC pressure lateral or submain at zone supply splits, drip zone takeoffs, and secondary header branch points in high-pressure commercial irrigation, greenhouse, and agricultural water supply systems where the 3/4" branch capacity serves the downstream zone or lateral flow requirement from the 1" primary lateral
• Instrument & Equipment Supply Branching — Provides a 3/4" solvent-cemented instrument supply or equipment feed branch off a 1" process header at monitoring station supply takeoffs, small equipment feed connections, and secondary instrument supply header branch points in Schedule 80 PVC systems where the branch pipe size is 3/4" and the main run continues at the full 1" diameter
• HVAC & Mechanical Systems — Branches a 3/4" secondary supply run off a 1" Schedule 80 PVC cooling tower makeup main, treated water distribution header, or glycol system primary line at zone supply splits, equipment feed branches, and secondary distribution takeoffs in commercial mechanical system piping requiring Schedule 80 pressure performance at the reducing branch connection