The basin and cover is an integral part of your sump pump installation. The size of the basin, for a specific pump, is recommended by the pump manufacturer in most cases. This is referred to in the owners manual and this size is usually the minimum.
The size and type of the basin can also be specified by a plumbing designer or engineer when a building or home is being designed based on the local and or state plumbing code requirements. Standard basin diameter sizes are 8", 24", 30", 36", and up to 72". The depths we stock range from 24" to 120" in 12" increments.
The covers in sanitary sump systems are usually sealed and vented per code. Drainage or stormwater sumps may just have a simple slotted or split cover. However, many are sealed and vented because of radon and safety issues. Matching covers are available to fit the specified basins in solid, split, simplex and duplex.