Enjoy quick and easy filtered water when you need it with the Platypus® GravityWorks™ 4L Water Filter System. Designed to provide up to 4 liters of filtered water in just 2-1/2 minutes without any cumbersome pumping, this lightweight system utilizes gravity to deliver safe water for several people. This lightweight 10.75 oz. system includes a capable filter that meets all EPA and NSF guidelines for the removal of Bacteria and Protozoa, including Giardia, Cryptosporidium, E. coli, Salmonella and Cholera. Dual bag system also doubles as a handy water transport solution, carrying up to 8 liters. Made of Platypus' taste- and BPA-free food grade liners, the GravityWorks' 2 bags feature Platy™ zip opening for easy filling/emptying. The system's hollow fiber filter traps particles down to 0.2 microns and backflushes in just 4 seconds for easy maintenance. 9.5"x3.25" bags. Filters up to 1500 liters per filter. Manufacturer model #: 3135.
Easy-to-use, pump-free water filtering system
4 liters of filtered water in just 2-1/2 minutes
Lightweight 10.75 oz.
2 taste- and BPA-free food grade liners
Hollow fiber filter - traps particles down to 0.2 microns
Meets all EPA and NSF guidelines for the removal of Bacteria and Protozoa
Doubles as a water transport solution - holds up to 8 liters
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Reviews
Rated 5 out of
5 by
bigbritts from
easiest way to filter waterNo more pumping or small filter systems. Directions: Scoop water into dirty bag. Hook up filter and clean bag then hang dirty bag up higher (gravity). Put your feet up and watch it make safe, clean water in minutes. 4 liters will hydrate a crew for a while.
Date published: 2019-09-10
Rated 4 out of
5 by
K&K from
Best water system we've tried so far, with a few tweaksWe took this out on a canoe trip this fall. It filters very, very fast..4L in just a couple of minutes if you hang it high. Our routine: We use a cloth bucket to scoop water from the lake, let it settle, and then scoop the water through prefilter into the dirty bag--keeps grit out of the system. 2. Then hang and voila! Water. 3. We fill up our Nalgene bottles for drinking, and use rest in the clean bag as a water sack for camp cooking and cleaning. Tip: Back flush *every* time (as the directions say) and it runs like a charm. NOTE FOR THE DESIGN TEAM: That ziplock zipper is WAY hard to seal, especially with cold hands.
Date published: 2018-09-30
Rated 3 out of
5 by
pdxterrie from
Does not come with adapters included in 2L kitWas surprised that the 4L kit doesn't include adapters for Nalgene bottles and MSR bladders. Must be purchased separately, although they are included in the 2L kit.
Date published: 2018-07-11
Rated 3 out of
5 by
Trinity Santa from
Filter element durability issues.I use this system in the back country of California and southern Oregon. The reservoir bags are tough, but the filter element is not. I have had to replace the element nearly every time I've used this system due to element failure.
Date published: 2018-06-12
Rated 4 out of
5 by
Kristin from
Great filter. 4L in 4 minutes! But...impossible to close.This filter is amazing. 4L in about 4 minutes. It works very well in Montana. We've had it for years and the filter is still going strong. We've saved a lot of hikers who were spent from pumping or their filters just failed completely. So fast and easy - as long as you quickly backflush each time. Unfortunately, there is a deal breaker and here it is: the "zipper" closure on the dirty bag is impossible to get closed. I can't even do it. My husband has to do it and although he is strong, it's very very difficult. And if you can't get it closed, there is no vacuum and the filter won't work. Isn't there a better design or some sort of slide tool that can be offered to help close the bag?
Date published: 2018-06-06
Rated 5 out of
5 by
Nature Boy from
Easiest Filtration EverI used this for a week-long camping trip in the Boundary Waters Canoe Area Wilderness last fall. It worked great. There were 3 of us, so we went through a lot of water. We must have filtered at least 40 gallons over the course of the trip. The large 4-liter design made it easy to get enough water to fill our bottles, cook and do dishes. It only took about 10 minutes to filter the entire bag. I've used pump filters before this and will never go back to them. We used a designated "dirty" Nalgene to fill the bag which made that a snap. I'd seen some reviews about the grommets pulling out on the dirty bag, so I stuffed it in a mesh bag that originally held 10# of onions for hanging. Problem solved. I highly recommend this product.
Date published: 2018-04-08
Rated 5 out of
5 by
Jose from
I would buy this product again and againBest purchase ever, thank you so much!
Date published: 2018-03-06
Rated 5 out of
5 by
Cooker from
Awesome FilterI have used this filter on 5 or 6 backcountry camping trips now. It just plain works. I love being able to just fill the dirty bag and let it do it's thing. It works surprisingly fast. Light and easy to use.
WARNING: Can expose you to styrene, which is known to the State of California to cause cancer.