What Is the Purpose of a Pitless Adapter in a Water Well?

The purpose of the pitless adapter in a water well is to keep pumped water below the freezing point or frost line and to provide service access to the well pump and equipment without a well pit. The pitless adapter is a special fitting that seals the passage cut into the well casing and connects the horizontal pipe, which carries water from the well, with the well pipe. When removing a well pump, the point of disconnection is the adapter.