First, open a faucet to verify there is no water pressure. Turn off the electrical power to the pump and remove the pressure gauge or plug that is located in the pump housing. Fill the opening with water until full – this procedure displaces the air in the pump and replaces it with water. Reinstall the pressure gauge or plug snugly with Teflon tape or pipe thread compound. Turn on the electrical power – the gauge should show pressure build up almost immediately, and the system should go back to normal operation. If this procedure fails to restore the prime, you will need to call for service.