Slip Coupling, PVC Schedule 80 6" x 2" (829-528)

The 6" x 2" PVC Schedule 80 Reducing Slip Coupling (829-528) is a heavy-duty, inline reducer that transitions directly from a 6" slip socket to a 2" slip socket in a single, permanently bonded component — purpose-built for high-pressure and chemically aggressive piping systems where Schedule 40 construction is insufficient for the service conditions. The pronounced four-size reduction from 6" to 2" in a single fitting body makes the 829-528 a purpose-specific transition component, most commonly deployed where a large-diameter Schedule 80 supply main, distribution header, or manifold outlet must be reduced directly to a small-bore process branch, chemical injection line, instrumentation connection, or secondary feed without assembling a chain of intermediate reducing fittings or stacking multiple inline couplings and bushings.

With slip socket connections on both ends, the 829-528 accepts solvent-welded Schedule 80 PVC pipe at both the 6" inlet and the 2" outlet — producing a permanently bonded, full-pressure assembly with no threaded interfaces, mechanical connections, or gaskets that could degrade under the pressure cycling, chemical exposure, or vibration conditions typical of industrial and process environments. The all-solvent construction maintains the structural continuity and chemical resistance of the Schedule 80 pipe system through the entire reduction zone, delivering consistent wall integrity from the large-bore inlet through the fitting body to the small-bore outlet.

Manufactured from gray PVC compound meeting ASTM D2467 dimensional standards, the 829-528 delivers Schedule 80's characteristically higher pressure rating, increased wall thickness, and broad chemical resistance to acids, caustics, solvents, and oxidizing fluids — making it a reliable long-term component in the demanding chemical processing, industrial wastewater, semiconductor, and process piping environments where Schedule 80 reducing couplings at this size combination are most frequently specified. The single-component approach eliminates the alternative of pairing a full-size 6" coupling with one or more reducing bushings, reducing installed joint count, simplifying the installation, and producing a more compact and structurally consistent inline reduction at the transition point.

Specifications:

Use heavy-bodied solvent cement rated for Schedule 80 PVC on all joints. Confirm that both the 6" and 2" receiving pipe or fittings are Schedule 80 to ensure correct socket interference fit and full rated pressure performance at both ends. The wide pressure rating differential between the 6" and 2" ends reflects Schedule 80 standard pressure class variation by diameter — the system operating pressure must remain within the lower of the two rated values across the full assembly. Pressure-temperature derating applies at elevated service temperatures per ASTM standards. Verify chemical compatibility for non-water service prior to installation.

Industries & Applications:

• Chemical Processing & Transfer — Inline reduction from a 6" Schedule 80 chemical supply header, manifold outlet, or vessel nozzle directly to a 2" process branch, metered dosing line, or secondary chemical feed in corrosive acid, caustic, or oxidizing fluid service where Schedule 80 pressure and chemical ratings are required through the full reduction zone
• Industrial Wastewater & Effluent Handling — Transitioning from a large-diameter Schedule 80 collection header or neutralization system outlet to a 2" discharge branch, drain connection, or transfer line in industrial waste treatment systems handling aggressive or chemically active effluent streams
• Water & Wastewater Treatment — Process piping size reductions at chemical feed headers, filter influent manifolds, aeration distribution systems, and instrumentation tap locations where Schedule 80 construction is specified for pressure integrity and chemical resistance throughout the transition zone
• Semiconductor & Electronics Manufacturing — Ultra-pure water (UPW) and chemical distribution systems where Schedule 80 PVC is the material of record and 6"-to-2" inline reductions occur at skid connection points, manifold outlets, or equipment-level distribution drops requiring full Schedule 80 continuity through the transition fitting
• Plating & Metal Finishing — Acid, caustic, and process chemical supply piping requiring a corrosion-resistant, pressure-rated inline reduction from a 6" supply header to a 2" tank inlet, rinse line feed, or recirculation branch in aggressive surface finishing environments
• Industrial Cooling & HVAC Systems — Cooling tower chemical treatment mains and condenser water distribution systems requiring a Schedule 80 inline reduction at chemical injection skid inlets, bleed-off connections, secondary circuit feeds, or small-bore equipment supply points
• Power Generation Facilities — Demineralized water, chemical treatment, and cooling system piping at power plants and industrial energy facilities where large-bore Schedule 80 headers require an inline step-down to 2" instrumentation, secondary process, or chemical delivery lines
• Pulp, Paper & Food Processing — Process fluid distribution headers and CIP (clean-in-place) supply systems where Schedule 80 pressure performance and chemical resistance are required at large-to-small bore inline transitions between main supply headers and equipment-level or process-level delivery piping