Reducing Tee, Slip x Slip x Slip PVC Schedule 40 3" x 3" x 1/2" (401-333)

The 401-333 is a 3" x 3" x 1/2" Schedule 40 PVC reducing tee with slip (socket) connections on all three ports. Both run ends are 3 inches and the branch outlet is 1/2 inch — a four nominal step reduction at the branch, the most aggressive in the 401-series 3-inch run sub-group. All three ports are solvent weld sockets with no threaded interfaces on any port, making every joint in the assembly permanent once cemented. The all-slip construction is the single characteristic that defines the 401-333's position in the Schedule 40 reducing tee catalog and separates it from the fitting buyers most often consider alongside it.

The 402-333 — a 3" x 3" x 1/2" Schedule 40 reducing tee with a Slip x Slip x FPT configuration — is the closest related fitting and the most likely source of ordering confusion. Both are white Schedule 40 PVC, both have 3-inch solvent weld run ends, and both have a 1/2-inch branch. The difference is the branch: the 402-333's FPT branch is a female NPT threaded port designed for removable, reconnectable connections — pressure gauges, injection quills, air release valves, drain petcocks, and instrumentation fittings that must be threaded in and out over the system's life. The 401-333's all-slip branch is a solvent weld socket designed for permanently cemented 1/2-inch downstream pipe runs that will not be disconnected. If the 1/2-inch branch connection must ever be broken, replaced, or accessed independently without cutting pipe, the 402-333 is the correct fitting. If the branch is a fixed, permanently routed small-bore pipe run that will remain cemented in place throughout the system's service life, the 401-333 is the appropriate choice.

The four nominal step reduction from 3 inches to 1/2 inch reflects a specific and deliberate application context. The 3-inch run carries full mainline flow straight through the fitting body with no restriction, while the 1/2-inch branch delivers a permanently cemented small-bore outlet. This branch is not sized for secondary distribution at scale — it is sized for permanently routed small-bore downstream pipe runs feeding individual drip emitters, micro-irrigation laterals, fixed chemical injection sub-lines, permanently piped drain connections, and small-bore service sub-runs where the downstream flow demand is modest and the pipe run is a fixed, solvent-welded installation from the tee branch socket to its terminus. The consolidation value — replacing a full-size tee plus a reducing coupling with a single fitting body — applies here exactly as on the 402-333, but the all-slip configuration makes the 401-333 specifically suited to the subset of those applications where the branch itself is as permanent as the run.

Both 3-inch run ends require heavy-bodied PVC solvent cement applied thoroughly and quickly to both the pipe end and socket bore. Pipe should be seated immediately with a quarter-turn rotation to distribute cement evenly, then held firmly for 30 seconds. Allow a full 24-hour cure before pressurizing the system. The 1/2-inch branch socket follows standard Schedule 40 PVC cement procedures — primer and standard-bodied cement are appropriate at this smaller bore. All three sockets must be individually primed and cemented; confirm branch orientation before any joint sets, as all three are fixed once cured.

This fitting is manufactured from virgin PVC compound conforming to ASTM D1784 Cell Classification 12454 and dimensioned to ASTM D2466 standards for Schedule 40 PVC socket fittings.

Specifications:

Pressure rating is for water service at 73°F. Assembly pressure rating is governed by the lower-rated 3-inch run ends at 160 PSI. The 1/2-inch branch end in isolation rates at 600 PSI — the largest end-to-end differential in the 401-series 3-inch run sub-group — but does not govern the assembled fitting rating. Derate for elevated temperatures per manufacturer guidelines. Use heavy-bodied PVC solvent cement for 3-inch socket joints; standard cement is appropriate for the 1/2-inch branch socket. All three socket joints are permanent once cemented — confirm branch orientation before cement sets. Buyers requiring a serviceable or reconnectable 1/2-inch branch port should specify the 402-333 (Slip x Slip x FPT) rather than this all-slip fitting.

Industries & Applications:

The 401-333 Schedule 40 reducing tee serves residential, commercial, and light industrial piping applications wherever a 3-inch Schedule 40 PVC mainline requires a permanent all-solvent-weld 1/2-inch small-bore branch for fixed sub-line connections in systems where the branch joint will remain permanently cemented:

• Irrigation & Agricultural Distribution — Permanent all-slip small-bore branch connections on 3-inch irrigation supply headers where a 1/2-inch branch feeds permanently routed drip emitter supply sub-mains, micro-irrigation laterals, and small-bore distribution tubes as a fixed cemented branch in field distribution networks where all connections throughout the system are permanent solvent weld joints and no reconnectable branch interface is required at the tee location
• Chemical Processing & Water Treatment — Permanent all-slip small-bore branch connections on 3-inch chemical distribution and process water headers where a 1/2-inch branch feeds permanently routed chemical injection sub-lines and small-bore treatment equipment connections — applications where the injection point is a fixed, permanently piped installation rather than a removable quill or fittings assembly that would require the 402-333's threaded FPT branch
• Municipal & Commercial Plumbing — Permanent small-bore reducing branches on 3-inch Schedule 40 utility water mains and mechanical room headers where a 1/2-inch all-slip branch supplies permanently routed fixture supply sub-lines, small-bore distribution connections, and fixed service branches as permanent cemented joints in all-solvent-weld system buildouts
• Stormwater & Drainage Infrastructure — Permanent reducing branch connections on 3-inch Schedule 40 stormwater conveyance and drainage systems where a 1/2-inch all-slip branch provides permanently cemented small-bore drain sub-line connections, overflow relief sub-runs, and fixed secondary drainage outlets in buried drainage networks where all-slip construction is consistent throughout the installation
• Industrial Process & Utility Piping — Permanent small-bore sub-line branches on 3-inch process water and utility supply headers where a 1/2-inch all-slip branch feeds permanently routed instrument supply sub-lines, small-bore service connections, and fixed equipment supply runs at defined tee locations in permanently built-out all-solvent-weld systems where no threaded branch interface is specified
• Swimming Pool & Aquatic Facility Plumbing — Permanent small-bore branch connections on 3-inch pool and spa recirculation mains where a 1/2-inch all-slip branch supplies permanently routed chemical injection sub-lines and small-bore equipment connections in equipment room piping layouts built entirely from solvent weld fittings with no threaded branch interfaces at tee locations
• HVAC & Cooling Systems — Permanent small-bore branch connections on 3-inch condenser water and chilled water distribution headers where a 1/2-inch all-slip branch supplies permanently cemented instrument supply sub-runs, small-bore chemical treatment feeds, and fixed service branches in mechanical room installations where the all-solvent-weld construction of the surrounding piping system is maintained consistently throughout