Pitless adapter

A pitless adapter is used to create a frost-proof and watertight connection through the casing of a drilled well, allowing a submersible pump to be installed without having pipes or hoses above ground. The pitless adapter consists of two parts: a fixed part mounted in the well casing, and a movable part attached to the pump’s riser pipe. When the pump is lowered, the two parts lock together and form a sealed connection.

Installation begins by mounting the fixed part of the pitless adapter in the well casing at the correct depth, usually below the frost line. It is sealed with an O-ring or gasket and may require drilling through the casing to lock it in place, depending on the model. Then the riser pipe is installed on the pump. This pipe may be made of PE, stainless steel or galvanized steel. The movable part of the pitless adapter is then mounted at the top of the riser pipe. Everything must be tightened and checked to avoid leaks.

The pump is fitted with a safety rope or stainless-steel wire so it can be pulled up for service. The electrical cable is secured to the riser pipe with clamps so it cannot rub or get caught inside the casing. Once everything is ready, the pump is lowered slowly into the well. When the movable part reaches the fixed part, it automatically locks in place by sliding into its seat. You will usually feel a clear stop as it engages.

Once the pump is seated in the adapter, the riser pipe and pump are directly connected to the horizontal outlet leading to the house’s water line, without any exposed connections above ground. The outlet on the outside of the pitless adapter is then connected to the pressure line, check valve and any shut-off valve leading to the house. The pump can then be tested by pressurizing the system and confirming that the adapter is fully sealed.

In summary: install the fixed part in the casing, mount the movable part on the riser pipe, lower the pump until the parts lock together, secure the pump and cable, and connect the pressure line to the house. The pitless adapter ensures a frost-proof, watertight and service-friendly installation.