Reducing Coupling, Slip PVC Schedule 80 4" x 2" (829-420)

The 4" x 2" PVC Schedule 80 Reducing Coupling (829-420) provides a direct, inline size transition from a 4" primary line down to a 2" continuation run — in a single fitting, without additional adapters or intermediate reducers. Both ends use slip (socket) connections for permanent, solvent-welded joints, delivering a clean, pressure-rated inline reduction that maintains the full structural integrity of a Schedule 80 gray PVC assembly throughout.

The significant size differential between the 4" and 2" ports makes this coupling a purpose-built solution for systems where high-volume primary headers must step down sharply to smaller-diameter distribution or service runs. Eliminating intermediate fittings at the transition point keeps the installation compact, reduces potential leak points, and simplifies the assembly in tight mechanical spaces or congested pipe runs where additional coupling hardware would complicate the layout.

Manufactured to Schedule 80 specifications and dimensionally compliant with ASTM D2467, the 829-420 delivers the elevated wall thickness and increased pressure rating that Schedule 80 gray PVC is specified for in chemical processing, industrial fluid handling, and demanding commercial applications. Gray PVC construction provides broad chemical compatibility with acids, alkalis, and a wide range of industrial process fluids where white Schedule 40 PVC is not appropriate. NSF 61 certification confirms suitability for potable water contact where required.

Specifications:

Industries & Applications:

• Chemical Processing — inline size reductions on chemical feed, dosing, and process fluid distribution headers where a single fitting transition is preferred over a multi-fitting assembly
• Industrial Process Piping — primary-to-secondary line reductions in plant utility, cooling water, and recirculating process systems requiring Schedule 80 pressure and chemical performance
• Water & Wastewater Treatment — inline reducing connections in treatment plant process piping where a sharp diameter reduction is required and Schedule 80 is specified for pressure or chemical compatibility
• Commercial & Industrial Plumbing — header-to-branch inline reductions in high-pressure mechanical systems where Schedule 40 pressure ratings are insufficient for the application
• Aquaculture & Food Processing — corrosion-resistant inline size transitions in recirculating systems and sanitary or chemical-exposure fluid handling installations
• Irrigation & Agriculture — mainline-to-distribution inline reductions in high-pressure chemical injection or fertilizer delivery systems