90 Degree Elbow, Slip x Slip PVC Schedule 40 2-1/2" (406-025)

This 2-1/2" Schedule 40 PVC 90 Degree Elbow provides a permanent, solvent-cemented right-angle directional change in a Schedule 40 PVC pressure piping system, routing a 2-1/2" pipe run through a 90° turn in a single fitting. Both slip socket ends accept standard 2-1/2" PVC pipe for solvent cement joining, producing a fully solvent-welded 90° directional change that becomes a continuous, integral part of the piping system once cured.

Two parallel distinctions define where the 406-025 belongs in a system layout. The first is connection type. Within the Schedule 40 90° elbow family at 2-1/2", the 406 all-socket series serves fully solvent-welded PVC pipe systems where both sides of the right-angle turn are cemented pipe ends — the correct configuration wherever both connections at the directional change are plain PVC pipe joined by solvent cement. Mixed-connection variants that bridge a solvent-welded inlet to a female-threaded outlet serve different downstream connection requirements. When both connections at the 90° turn are solvent-welded PVC pipe, the 406-025 is the correct selection.

The second distinction is turn angle. The 406-025 produces a 90° right-angle turn — the standard directional change for routing pipe runs around corners, through wall penetrations, and between horizontal and vertical orientations. This distinguishes it from the 417-025 Schedule 40 Slip × Slip 45° elbow at the same pipe size and schedule, which provides a shallower half-right-angle offset for diagonal routing, compound-angle assemblies, and reduced-turbulence directional transitions. The 90° geometry is the more common selection for straightforward right-angle direction changes in solvent-welded systems — routing a run cleanly around a 90° corner, changing a pipe from horizontal to vertical, or turning through a wall penetration at a right angle. When the routing requirement is a clean, abrupt right-angle direction change in a fully solvent-welded Schedule 40 system, the 406-025 is the direct solution. When a shallower offset, diagonal alignment, or compound-angle assembly is required, the 417-025 applies.

At 2-1/2", the 406-025 serves a pipe size that occupies a specific intermediate position in commercial and industrial piping layouts — larger than the common 2" distribution size but smaller than the 3" main sizes used for higher-volume headers. This intermediate pipe size appears where a specific flow requirement, system hydraulic calculation, or equipment connection size falls between the adjacent standard sizes — at equipment discharge connections, pump station outlet headers, pool and spa recirculation mains, and irrigation submain runs where 2" is hydraulically insufficient and 3" introduces unnecessary capacity. At these 2-1/2" system positions, the 90° elbow is one of the highest-frequency fittings in the layout, providing the right-angle routing turns that define the fixed geometry of the piping system wherever the direction must change.

The permanently solvent-cemented construction of the 406-025 produces a monolithic, chemically fused joint at each socket end — a connection that, once cured, is as strong as or stronger than the pipe itself and requires no periodic inspection, re-torquing, or maintenance at the joint. This permanence is the correct design choice for the routing turns that define the fixed geometry of a piping system layout, where the directional change is a structural feature of the installation rather than a serviceable connection point.

Manufactured in white Schedule 40 PVC, this elbow 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 in environments where metal elbows would corrode, scale, or introduce contamination into the fluid stream. The smooth interior bore minimizes flow resistance through the right-angle turn, maintaining system hydraulic efficiency at the directional change point. NSF/ANSI 61 and NSF/ANSI 14 listings confirm suitability for potable water contact.

Rated to 300 psi at 73°F, this fitting handles standard pressure service across irrigation, water distribution, pool and spa systems, and process piping at the 2-1/2" intermediate pipe size. For installation, clean and dry both pipe ends and socket interiors before application. Apply purple PVC primer to all mating surfaces — both pipe ends and both socket interiors. At 2-1/2", use a medium-body PVC solvent cement; apply a uniform coat to both the pipe end and socket interior at each end before joining. Insert the pipe with a slight quarter-turn twist and hold firmly for 30 seconds to prevent pushback. Confirm the 90° turn orientation before cementing the second joint — the direction of the right-angle turn is set permanently at installation and cannot be adjusted after both joints are cured. Stagger the two 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:

• Commercial Plumbing & Water Distribution — Routes 2-1/2" Schedule 40 PVC solvent-welded water supply mains and distribution headers through 90° right-angle turns at wall penetrations, structural corners, equipment clearance transitions, and horizontal-to-vertical routing changes in commercial building water distribution systems where the intermediate 2-1/2" pipe size serves the specific flow requirement between smaller 2" and larger 3" mains
• Industrial Process Piping — Changes direction on 2-1/2" Schedule 40 PVC process headers, equipment supply lines, and distribution runs at right-angle structural clearances, equipment footprint corners, and layout transitions in chemical processing, water treatment, and light manufacturing facility piping where the 2-1/2" pipe size is hydraulically specified for the process flow requirement
• Irrigation & Agriculture — Provides right-angle direction changes on 2-1/2" Schedule 40 PVC solvent-welded submain and mainline headers at field boundary corners, pump station outlet turns, buried mainline transitions, and above-grade routing changes in large-scale commercial and agricultural irrigation systems where the 2-1/2" pipe size serves defined sector or zone flow requirements between smaller laterals and larger distribution mains
• Pool, Spa & Aquaculture — Routes 2-1/2" PVC recirculation, filtration return, and backwash piping through 90° turns at equipment pad layout corners, pump inlet approaches, filter vessel connections, underground pipe run transitions, and mechanical room routing changes in aquatic facility, commercial pool, and water feature installations where the 2-1/2" pipe size serves the recirculation flow requirement
• Water & Wastewater Treatment — Redirects 2-1/2" Schedule 40 PVC process and distribution piping at 90° routing transitions on filter vessel headers, pump discharge runs, chemical distribution mains, and secondary distribution systems in municipal and industrial water treatment facilities where the intermediate 2-1/2" pipe size meets specific hydraulic design parameters
• Pump Station & Equipment Routing — Provides 90° right-angle direction changes on 2-1/2" Schedule 40 PVC pump discharge headers, equipment supply runs, and process connection piping at pump layout corners, equipment footprint clearances, and structural transition points where the 2-1/2" pipe size serves the pump discharge flow requirement between smaller branch sizes and larger distribution headers
• Site Utilities & Underground Piping — Routes 2-1/2" Schedule 40 PVC buried and above-grade utility water mains and site distribution lines through 90° turns at property line corners, building entry points, grade transitions, and utility routing changes in commercial site development and municipal distribution systems where the intermediate pipe size is specified in the hydraulic design