Introducing the revolutionary, new triple patent pending design for catch basins that will make all other inline catch basins obsolete. This innovative design boasts a larger sump capacity for sediment, and a slim 5" width to fit in a trench made with a trencher. The best part is, the slim design does not require a large hole, making installation a breeze. Not sure which basin size is best for your application? Check out FDM's video on how to size your basin for your specific drainage needs and project environment: How to know if you need a 6 in. or 4 in. catch basin. Add 1.5 inches of height to basin: FDM's 6 in. Catch Basin Riser.