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Do you have an existing riser that needs to be extended? Use our simple extension kits to raise the height of your current riser.

  • Includes Butyl Sealant, Hardware, Corrugated Pipe, Connector Flange, & Safety Barrier
  • Fits new ADS 24″ (23.5″) and old ADS 24″ inside diameter double wall corrugated pipe
  • Fits 24″ inside diameter concrete risers
  • Heights from 6″ up to 18″ available (contact us for custom applications >18″)
  • Made of 100% Recycled HDPE
  • Note: Masonry fasteners not included with kit

Installation Guide Download

Additional information

Pipe ID

23.5 Inches

Pipe OD

28.25 Inches


Recycled HDPE


Pipe, Connector Flange, Safety Barrier, Butyl Sealant &, Hardware

Compatible with

24 Inch ID Corrugated Pipe & Concrete Risers (28 Inch Minimum OD Required)