Reducing Tee, Slip x Slip x Slip PVC Schedule 40 3" x 3" x 3/4" (401-334)

The 401-334 is a 3" x 3" x 3/4" Schedule 40 PVC reducing tee with slip (socket) connections on all three ports. Both run ends are 3 inches and the branch outlet is 3/4 inch — a three nominal step reduction at the branch. All three ports are solvent weld sockets with no threaded interfaces on any port, making every joint in the assembly permanent once cemented. This all-slip construction is the defining architectural characteristic that separates the 401-334 from its closest catalog neighbor: the 402-334, which shares the same 3" x 3" x 3/4" nominal dimensions and Schedule 40 construction but provides a female NPT threaded branch that can be broken and remade independently over the system's service life.

The decision between the 401-334 and the 402-334 comes down to one question: does the 3/4-inch branch connection need to remain serviceable and reconnectable, or is it a permanently routed pipe run? When the branch is a fixed, permanently cemented pipe run connecting to downstream distribution piping, equipment, or a fixed service point that will not require removal or reconfiguration, the 401-334's all-slip construction provides a cleaner, fully consistent solvent weld assembly across all three ports with no threaded interface at the branch position. When the branch must accept and release threaded valves, injection fittings, gauges, or equipment connections over the system's life, the 402-334 with its FPT branch is the appropriate fitting. Both are valid choices — the selection depends entirely on whether the branch joint is permanent or serviceable.

The 3-inch run passes mainline flow through the fitting body with no restriction while the 3/4-inch all-slip branch delivers a permanently cemented reduced service outlet. At 3/4 inch, the branch is a full-service pipe size carrying real flow volume — appropriate for zone distribution feeds, secondary supply branches, chemical sub-lines, and equipment supply runs where the downstream pipe continues as a fixed, solvent-welded extension of the tee branch socket. The three nominal step reduction from 3 inches to 3/4 inch is aggressive but purposeful: it consolidates what would otherwise require a full-size all-slip tee followed by a reducing coupling into a single fitting body with one fewer cemented joint and a more compact installation footprint at the branch junction.

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 3/4-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 3/4-inch branch end in isolation rates at 690 PSI 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. All three socket joints are permanent once cemented — confirm branch orientation before cement sets.

Industries & Applications:

The 401-334 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 3/4-inch branch for secondary distribution, zone supply, or service connections in systems where the branch joint is a fixed, permanently routed installation:

• Irrigation & Agricultural Distribution — Permanent all-slip branch connections on 3-inch irrigation supply headers where a 3/4-inch branch feeds permanently routed zone distribution sub-mains, drip system laterals, and individual zone valve supply lines as a fixed cemented branch in field distribution networks where all joints are permanent solvent weld and no threaded branch interface is required at the tee location
• Municipal & Commercial Plumbing — Permanent three-way reducing connections on 3-inch Schedule 40 utility water mains and mechanical room headers where a 3/4-inch all-slip branch supplies permanently routed fixture supply branches, secondary distribution runs, and service connections as fixed permanent joints consistent with an all-solvent-weld system build-out
• Stormwater & Drainage Infrastructure — Permanent reducing branch connections on 3-inch Schedule 40 stormwater conveyance and drainage systems where a 3/4-inch branch provides permanently cemented drain sub-line connections, overflow relief branches, and secondary drainage outlets in buried or surface drainage networks where all-slip construction is specified throughout
• Swimming Pool & Aquatic Facility Plumbing — Permanent branch connections on 3-inch pool and spa recirculation mains where a 3/4-inch all-slip branch supplies fixed chemical injection sub-lines, pressure monitoring tap feeds, and small equipment supply runs as permanently cemented branches consistent with the all-solvent-weld construction of commercial pool equipment room piping
• Chemical Processing & Water Treatment — Permanent all-slip three-way flow distribution on 3-inch chemical distribution and process water headers where a 3/4-inch branch feeds permanently routed chemical injection sub-lines, secondary treatment loops, and small equipment supply connections in systems where all-solvent-weld construction is specified for joint strength and chemical resistance throughout the assembly
• Industrial Process & Utility Piping — Permanent reducing branch connections on 3-inch process water, cooling water, and utility supply headers where a 3/4-inch all-slip branch supplies fixed secondary process lines, instrument supply sub-runs, and equipment connections at defined tee locations in permanently built-out solvent weld piping systems
• HVAC & Cooling Systems — Permanent small-capacity branch connections on 3-inch condenser water and chilled water distribution headers where a 3/4-inch all-slip branch supplies fixed chemical treatment sub-lines, instrument supply runs, and secondary equipment connections as permanently cemented junctions in mechanical room installations where all-solvent-weld construction is consistent throughout the system