22x22 Plastic NEO catch basin (NEO 550-CBP), ductile cast iron grate (ADA), C ClassVodaland's 22x22 plastic NEO catch basin is a coned shaped basin with a 22" width, length, and height. This catch basin comes with a C class ADA ductile cast iron grate. The C load class is designed to withstand light vehicle traffic. The basin includes a pipe connection adapter available in diameters of 4, 6" and 8 (see drawing for details). Alternately, you can use the connection cut outs on the side and bottom directly with various sizes from 6",