First Need Deluxe Water Filter System  w/Field Serviceable Pump NO GIARDIA! New Old Stock, sealed package. This Deluxe Microfilter system is just what the doctor ordered, when a safe and secure drinking water supply is not readily available. Ideal for campers, back-packers, Sportsmen, Tourists, Cyclists or for emergency preparedness. Filters out harmful bacteria, cysts, tapeworms, and other protozoan organisms. Simply pump your water through the filter--pump feeds on both strokes--when pumping becomes difficult, it is possible to simply back-flush the filter and you are back in business. On the package, the "field serviceable" pump is described as a new feature. Includes pump, hose, filter, instructions and carry bag to hold it all. Compact unit will not take up much space in a backpack or emergency preparedness kit.