No pumping required-water container with built-in filter. Ideal for groups, camps and cabins. Does not help with taste & odor and will not absorb any chemicals like chlorine. Exclusive silver impregnated ceramic elements (3) last up to 39,000 gal. before replacement is needed. Microfiltration method: Field-cleanable 0.2 micron ceramic depth filter. Output: Approx. 1 gal./hour. Weight: 7.3 lbs. Height: 18". Includes: 3 cleanable filter elements, measuring gauge and cleaning pad.