1 pointAir Diaphragm pumps just last and last. All-Flo offers a 5 year warranty. 12 volt pumps offer relatively no warranty. Air systems use less than half the chemical compared to 12 volt, shoot farther, allow you to transfer chem with the same pump, allow you do perform more jobs in a day, can run all day and night without depending on a battery charge and are designed for use with softwash chems. It’s a no brainer!