He saw the flaws inherent in well pit installation, and came up with a “means for extracting the liquid from a cased well below the top of the casing” in its stead. Later known as the pitless adapter, Martinson's basic design remains in use to this day.

How does a Pitless Adaptor work?

A pitless adapter is attached to your well casing to provide a sanitary and frost- proof seal between the casing and the water line running to your home. This device protects the water from freezing and permits convenient access to the well and well components without having to dig around the well.

Can a Pitless adapter be used with a jet pump?

The slide pitless adapter allows for easy installation or removal of the submersible pump by lifting the pitless elbow using the pull pipe. ... They are also sometimes used to install the drop pipe and foot valve in shallow well jet pump systems.