H2Optimal has designed pitless units which connect to the well casing and houses the pressure tank and controls. Pressure tank sizes range from 2.1 gallons to 8.6 gallons. The pressure tank is removed with a pull strap after the lid is removed. A coupling is placed on a standard pull pipe and screwed on to the pitless adapter over the tank nipple. The pump is pulled as usual. Pitless units have changed little in the last 50 years. They protect the groundwater by eliminating well pits and use watertight caps.