NDS Universal Adapters are used to connect 3" or 4" pipe to 9", 12", 18" and 24" Catch Basin Series. Features one end fits into 9", 12", 18" and 24" Catch Basin Series or #930, #1230, #1830, and #2410 adapters. Use with 24" Catch Basin Series also requires #2410 One end fits 3" & 4" Sewer and Drain Pipe, 3" & 4" Corrugated Pipe, 3" & 4" Triple wall Pipe, 4" PVC Schedule 40 Pipe