Turn the pump off.
Remove the fill plug from the top of the pump housing with an adjustable wrench. On most pumps, the fill plug is a square-headed bolt mounted in the top center of the housing directly above the suction line.
Loosen and remove the small vent plug. This is usually located either directly above the suction line or beside the fill plug on the top of the pump housing.
Fill the pump housing with water. Pour slowly.
The water will flow into and fill the suction line, forcing air back through the pump housing as it fills.
Replace and tighten the vent plug when the pump housing is full.
Replace the fill plug but do not tighten it.
Turn the pump on. Allow the pump to run until water begins to escape around the edges of the fill plug.
Turn the pump off. Remove the fill plug and fill the pump housing with water again if necessary.
Replace and tighten the fill plug.
Turn the pump on.
Open the faucet on the bottom of the pressure tank only enough to allow air to escape. Once the water pressure inside the tank begins to climb, close the faucet.