This water filter does not require pumping: just leave the AutoFlow to do its job and concentrate on other chores. The reservoir bag can also be used for carrying the water to your campsite. - 10 liter capacity - Fast: in optimal conditions the filtration speed can be up to 1.75 liters per minute - Filters 99.9999% of bacteria and 99.9% protozoa even in "worst case water" conditions to the end of filter life - Easily field maintainable with no need for taking the filter apart - Nifty adapter included, making for fluent use with most bottles and hydration bags - Intake hose 30 cm, output hose 120 cm Don't allow your filter to freeze. Water expands as it freezes and may break the filter element. *Note!* A water filter or purifier tablets cannot remove the toxins created by algae bloom, and therefore do not make water containing said toxins safe to drink.