The NDS 1890 Universal Outlet Reducer Ring adapts NDS catch basins to a range of smaller piping sizes, providing a simple, reliable transition for drainage systems. Designed for use on basin outlets, this reducer ring ensures compatibility with corrugated, sewer & drain, and Sch.40 piping where a secure fit is required. Universal compatibility: Adapts to 3", 4", 6" and other small-diameter pipe sizes when used with the appropriate basin outlet. Required application: Required on #1821 basin side when using 3", 4", or 6" pipe and when connecting to universal outlets #1206, #1243, #1245, #1266, or #1889. Fits larger pipe: Designed to fit 8" sewer and drain pipe and 8" corrugated pipe on the basin side of the connection. Works with multiple pipe types: Universal adapters will connect corrugated, sewer & drain, and Sch.40 pipe in sizes ranging from 3" to 12" in compatible installations. Finish and appearance: Black color for a low-profile installation that resists visible staining in buried or exposed applications. Use the NDS 1890 reducer ring wherever a basin adapter must match a smaller outlet size — especially on jobs that require mixing corrugated and solid-wall piping. Refer to NDS documentation for basin-specific installation guidance and the compatible outlet part numbers listed above. This compact reducer simplifies inventory and reduces the number of separate fittings needed on site while maintaining correct flow alignment for reliable drainage performance.
