Reducing Tee, Slip x Slip x Slip PVC Schedule 40 1" x 1/2" x 1" (401-122)

This 1" × 1/2" 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 1/2" 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 two-step size reduction occurs only at the branch, not at the run.

Within the 401-series 1" run reducing tee sub-group, the 401-122 makes the deeper two-step branch reduction — from the 1" run down to a 1/2" branch outlet — compared to the one-step 3/4" branch reduction of the 401-126. Both are 1" run reducing tees with equal run ports; the branch outlet size is the sole selection criterion between them. The 401-126 branches at 3/4" — the adjacent smaller pipe size that serves zone supply runs, secondary distribution lines, and equipment feeds where substantial branch flow capacity is required. The 401-122 branches at 1/2" — a two-step reduction that serves the small-bore chemical dosing connections, instrument supply branches, small equipment feeds, and fine-bore secondary supply lines that draw from 1" primary headers at flow rates well below 3/4" capacity.

The 1/2" branch outlet is what defines the 401-122's application niche. At 1/2" PVC pipe, the branch serves the most common small-bore pipe size in commercial and residential Schedule 40 systems — chemical dosing supply lines, instrument supply distribution runs, solenoid valve supply branches, small-bore equipment feeds, and secondary zone supply connections in irrigation, plumbing, pool and spa, and light industrial systems. Wherever a 1" Schedule 40 cemented main run must supply a 1/2" branch at a tee position — for any of these small-bore applications — the 401-122 provides the 1" run continuity with a built-in 1/2" branch in a single fitting. This eliminates the need for a 1" equal tee plus a separate 1"-to-1/2" reducer or reducing bushing downstream of the tee to achieve the same small-bore branch connection.

The 401-122 complements the 401-126 in any 1" Schedule 40 system where both 3/4" and 1/2" branches are required off the same 1" main at different positions. The 401-126 serves positions where the branch flow requirement calls for 3/4" capacity; the 401-122 serves positions where the branch requirement is the smaller 1/2" size. In irrigation systems where a 1" lateral tees to a 3/4" zone supply at one manifold position and also taps a 1/2" chemical injection or instrument supply line at another, both tee types appear in the same system serving their respective branch size requirements.

The governing-end pressure rating 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 — consistent with any 1" Schedule 40 fitting. The 1/2" branch socket would independently support a higher pressure at that bore size, but the assembly is governed by the 1" run ends. This means the 401-122 provides full 1" Schedule 40 system pressure rating at the branch tee position regardless of the smaller branch socket size.

The two-step reduction from 1" to 1/2" also reinforces the application specificity of this fitting. A one-step branch reduction (as in the 401-126) spans adjacent pipe sizes and typically serves secondary distribution and zone supply applications. A two-step reduction spans two pipe size intervals and specifically serves the small-bore branch supply niche — an indicator that the 401-122 is targeted at precisely the instrument supply, chemical dosing, and small equipment connection applications where 1/2" pipe is the correct branch size.

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 450 psi at 73°F (governed by the 1" 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" run port sockets, the 1/2" 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" run port sockets and the 1/2" 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 — Chemical Dosing & Instrument Branches — Taps a reducing 1/2" solvent-cemented branch off a 1" Schedule 40 PVC lateral or submain at chemical injection connection points, fertilizer injector supply branches, pressure gauge line takeoffs, solenoid valve supply branches, and flow monitoring instrument connections in residential and commercial irrigation systems where the 1/2" branch serves the small-bore instrument or chemical supply function while the 1" main run continues through the tee at full capacity
• Pool, Spa & Aquaculture — Provides a 1/2" reducing branch off a 1" solvent-cemented Schedule 40 PVC recirculation main or equipment distribution header at chemical dosing feed connections, pressure monitoring supply branches, small equipment feed positions, and secondary supply takeoffs in residential and commercial pool and spa installations where the 1/2" branch serves chemical treatment and monitoring functions off the 1" primary distribution run
• Commercial Plumbing — Branches a 1/2" supply line off a 1" solvent-welded Schedule 40 PVC water supply main at fixture supply branches, small equipment feed connections, pressure gauge line takeoffs, and secondary zone supply positions in commercial building water distribution systems where the 1/2" branch serves a specific small-bore supply function while the 1" primary run continues at full capacity through the tee
• Water & Wastewater Treatment — Taps a 1/2" reducing branch off a 1" Schedule 40 PVC secondary distribution header at chemical dosing supply connections, sampling line branches, instrument supply takeoffs, and secondary process branches in light-duty municipal and industrial water treatment facilities where the 1/2" branch serves chemical feed and monitoring functions off the 1" distribution main
• Chemical Dosing & Distribution — Provides a 1/2" solvent-cemented branch off a 1" Schedule 40 PVC chemical feed header or distribution main at parallel dosing circuit branches, reagent distribution takeoffs, and secondary chemical supply positions in light-duty Schedule 40 chemical dosing and distribution systems where the 1/2" downstream pipe serves the chemical dosing or distribution branch requirement off the 1" primary header
• Pump Station & Secondary Supply Branches — Taps a 1/2" reducing branch off a 1" Schedule 40 PVC pump discharge header, equipment supply run, or secondary distribution main at small equipment feed connections, gauge line takeoffs, pressure monitoring branches, and secondary supply positions in residential and commercial pump station assemblies where the 1/2" branch serves auxiliary and monitoring supply functions
• Light Industrial Process Piping — Provides a 1/2" reducing branch off a 1" solvent-welded Schedule 40 PVC process distribution header at chemical dosing branches, instrument supply connections, small equipment feeds, and secondary process branches in light industrial Schedule 40 systems where the 1/2" branch serves small-bore secondary supply or monitoring functions off the 1" primary process distribution run