Below you will find a side view of 22" high 5 inlet base. As well as a Rhino Inlet channel in 22" high 5 inlet base. The SD-22 is designed for sanitary sewers where a shallow base is required. The base will accomidated a 6 inch or 8 inch outlet and is marked for 4, 6, or 8 inch inlets on each of the 5 inlet plates. The SB-22 can also be used for storm water service.