ITEM NAME:DC 12V High Pressure Diaphragm Self Priming Vacuum Air Water Pump Suction_P B4Y2 HOT SALE body .shopclass { float: left; width: 100%;.Electric Liquid Fuel Syphon Pump Automatic Transfer Oil Water S Battery Gas A7H1AUD 10.15 2+ sold. Application: use as air pump, water pump. suction pump, vacuum Self-priming pump. Negative pressure (suction):-50kpa.