While the usual installation of a Simple Pump is on top of the casing of a drilled well, it can be installed in a wide or dug well -- e.g. a 3-foot wide well with a concrete liner and a concrete lid.
A hole would be drilled in the lid, and our mounting plate (top) or adaptor (bottom) secured with suitable bolts.
The mounting plate is used when the Simple Pump installation does not have to accommodate a submersible's discharge pipe and wiring. The well cap on the adaptor has a port for a submersible's pipe and its wiring.
Then, our well cap is attached and the pump installed, as it would be on any well casing.
The height of the Simple Pump can be adjusted about 2 feet up or down to position for comfortable pumping. For casing rims lower than usual (e.g. right at grade or a foot under grade in a mini-pit) our double-height riser tube can be used to give that comfortable pumping height.