But the company knew its large concrete system would be too costly and cumbersome for the low- flow (1 to 5-cfs) stormwater market. To make it lighter, the company worked with the plastics design and manufacturing firm Meese Orbitron Dunne Co., Madison, Ind.

MOD engineers designed a rotationally molded alternative using advanced 3D modeling that eliminates the weighty concrete vault and cover, and stainless-steel doors. The housing for the Trashmaster Net Capture System is a single rotationally molded part made from durable high-density polyethylene (HDPE), with a manhole cover for access. The housing costs about half as much, is one-fourth the weight, and installs in a day with on-site equipment, compared to a week for its concrete counterpart. The plastic part fits pipe up to 24 in. diameter and installs to a depth up to 10 ft.