Reducing Tee, Slip x Slip x Slip PVC Schedule 40 4" x 4" x 1-1/4" (401-418)
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Reducing Tee, Slip x Slip x Slip PVC Schedule 40 4" x 4" x 1-1/4" (401-418)
The 401-418 is a PVC Schedule 40 reducing tee with a 4" slip (socket) run and a 1-1/4" slip (socket) branch outlet, all joined by solvent cement welding per ASTM D2564. The two 4" run ports accept standard 4" PVC pipe ends for a permanent, pressure-rated inline connection, while the 1-1/4" slip branch accepts a standard 1-1/4" PVC pipe end — creating a fully solvent-welded, three-way reducing junction with no threaded connections at any port.
Manufactured from rigid PVC compound conforming to ASTM D1784 cell classification requirements, this fitting delivers the corrosion resistance, chemical compatibility, and long service life associated with Schedule 40 PVC across a wide range of commercial, industrial, and municipal piping systems. The Schedule 40 wall thickness provides reliable pressure-rated performance for both pressurized distribution systems and gravity-flow applications.
The 401-418 is the all-slip counterpart to the 402-418 (4" x 4" x 1-1/4" FPT branch) and occupies a specific position in the lower-middle range of the 4" all-slip reducing tee series — the 1-1/4" branch steps up from the 1" branch of the 401-417, offering modestly greater flow capacity for zone feeds, chemical supply lines, and service connections where 1" is undersized but a 1-1/2" or 2" branch would be disproportionately large for the downstream circuit. All three ports are permanent solvent-welded connections — the characteristic that defines the application context of this fitting completely. The 401-418 is the correct choice when the 1-1/4" branch is a designed-in, fixed element of the piping system that will never require disconnection, removal, or reconfiguration: a permanent chemical feed line, a fixed zone supply that is integral to the distribution layout, a dedicated service branch to a specific piece of equipment, or any other 1-1/4" branch connection where permanence is a design intent rather than a constraint. The 1-1/4" branch size sits firmly above the threshold where permanent solvent welding deserves deliberate consideration — downstream connected elements at this size include valve bodies, strainer assemblies, and flow control fittings that carry real replacement and maintenance histories in most long-term installations. Buyers who have any future serviceability requirement at the branch joint — including the possibility of valve replacement, equipment removal, or system reconfiguration — should select the 402-418 (FPT branch) instead, which provides an identical 4" slip run with a threaded 1-1/4" outlet that can be disengaged without cutting pipe. The all-slip configuration produces three permanent solvent-welded joints across all ports, delivering a clean, fully bonded installation with no threaded interfaces at any connection point.
Specifications:
| Attribute | Detail |
|---|---|
| Part Number | 401-418 |
| Material | PVC (Polyvinyl Chloride) |
| Schedule / Class | Schedule 40 |
| Fitting Type | Reducing Tee |
| Run End Connection | Slip (Socket) x Slip (Socket) |
| Branch End Connection | Slip (Socket) |
| Run Size | 4" x 4" |
| Branch Size | 1-1/4" |
| Connection Method | Solvent Cement Weld (all ports) |
| Pressure Rating | Rated per ASTM D2466 (temperature and size dependent) |
| Temperature Range | Up to 140°F (60°C) for pressure service |
| Color | White/Gray (PVC natural) |
| Standards | ASTM D2466, ASTM D1784 |
| Listing | NSF/ANSI 61 (potable water contact) |
Industries & Applications:
- Irrigation & Agriculture — Permanent 1-1/4" branch connections off 4" mainline headers for fixed zone valve feeds, dedicated chemical supply lines, and permanent moderate-flow service branches in large-scale pressurized irrigation systems where the branch is a designed-in long-term installation with no future serviceability requirement at the joint
- Municipal Water & Wastewater — Permanent moderate-flow service branches, fixed chemical dosing supply lines, and dedicated secondary connections off 4" distribution mains at pump stations and treatment facilities where a 1-1/4" all-solvent-weld branch is specified as a permanent system element
- Industrial Process Piping — Permanent 1-1/4" branch connections off 4" process fluid and cooling water mainlines for fixed chemical feed lines, dedicated bypass circuits, permanent service connections, and designed-in secondary supply branches in fully solvent-welded industrial piping systems
- HVAC & Mechanical — Permanent 1-1/4" branch connections off 4" chilled water and condenser water mainlines for fixed secondary circuit feeds, dedicated equipment supply lines, and permanent service branches in commercial mechanical rooms where all-slip PVC construction is specified throughout the system
- Commercial Plumbing — Permanent moderate-flow branch connections off 4" distribution headers for fixed zone supply lines, dedicated equipment feeds, and permanent secondary service circuits where the branch is a designed-in system element with no future removal or reconfiguration requirement
- Fire Suppression — Permanent auxiliary drain connections, fixed inspector test feeds, and dedicated secondary branches off 4" sprinkler system mains where a 1-1/4" all-solvent-welded branch is specified as a permanent element of a fully bonded fire suppression installation
- Part #:
- 401-418
- Product Family:
- Sch 40 PVC
- Carton Qty:
- 5
- Pallet Qty:
- 240
- Size:
- 4"
