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Ok, now that I have upset Platypus, here is what I found.
First, the thing works well! I filled the dirty bladder, hung it from a tree and within minutes, the clean bladder was full. refill the Dirty bladder and repeat! a GREAT DESIGN!!!
When I got home, I simply used distilled water and backflushed the filter in my shower to clean it out.
Two suggestions though.
The filter clogs easily so pre-filter this and any water-filter. I carry a cloth bag with a coffee filter or t-shirt as a pre-filter.
Second, air trapped in the Dirty hose can slow the process so purge the hose by letting some water flow from the hose before you attach it to the filter.
Aside from that, the system works and works well.
The only reason I gave it a 9 instead of a 10 is because I bought a used Sawyer which is smaller, lighter and has a longer life. The Sawyer, however, can use some refinements and requires additional parts to work as a drip-system.
This is the fastest system for filtering water, particularly large quantities, is one of the lightest filter systems, and requires little to no maintenance. I probably got about 1500 liters out of a single filter. It is an extremely versatile system since you can filter a small amount or a large amount of water at a time which works well for a camp of multiple people, or for a line kayaker.
The primary drawback to this system is that is more expensive than the average pump filters, but its ease of use make it worth it for me.
Pros: it's fast, easy to use and easy to maintain.
Cons: It's expensive and difficult to use with small, non-flowing water sources (which shouldn't be problem for kayakers). The Platypus waterworks runs about $120 and a replacement filter is about $40.
The cost is the only reason I gave it a 9 instead of a 10.
120,000+ people can't be wrong!
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