A: That depends fully over the product. Some companies contain a deflate or reverse possibility which immediately extracts the air from an inflatable kayak or arise paddle board. This function enables you to preserve time and helps you tightly fold up your equipment. The Kwik Tek Airhead AHP-120HP electric http://martinwhrcm.uzblog.net/the-ultimate-guide-to-size-matters-premium-black-pump-with-pressure-gauge-10711681