Don’t mess around with cheaper filters having a reliable water filtering source is crucial. Spend the extra money and get the peace of mind of having the best most reliable filter. This thing is built like a tank and will not ever let you down. It filters great and takes out all that nasty stuff that will make you sick. The pre filter on the intake tube is nice too, keeps big particles from entering the filter. It pumps remarkably fast compared to other filters. Some other campers were using MSR filters that would yield just a few drops every stroke. This Katadyn filter really pumps it out.