Air can typically get into the pressure pump pipeline reference below 4 points: 1. The water tank is a reasonable distance from the house 2. Your water pump sits higher than your water source and there is a straight pipe from the water source to the pump 3. The pipe from your tank supply to your water pump has a lot of bends or elbows 4. Loose connections or cracked pipes Buy industrial pumps from All Pump Machinery with more selections.