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  • Easy-to-use dry bag-style design provides safe, potable water for large groups, base camps and family camping trips
  • 6-liter water bag with roll-top and side-release buckle closure fills quickly and hangs easily; window on bag displays water level
  • Ultra Fast Flow Technology provides 2 liters per minute filtration; quick-release hoses connect easily to personal hydration bladders
  • Low maintenance, pleated glassfiber filter supplies fast water flow; cleanable filter protector extends filter life in challenging conditions
  • Filter physically removes silt, cysts, protozoa and bacteria down to 0.2 microns in size, including giardia, salmonella, cryptosporidia and others
  • Sediment trap eliminates backflushing hassles by trapping dirt before it enters the filter
  • Turn the filter's bladder into a camp shower with the Camp Series Shower Adaptor (sold separately)
  • Katadyn Gravity Camp 6L Water Filter includes field-cleaning supplies


View all Katadyn Gravity Water Filters

REI membership


Best Use Camping
Filter Type Gravity
Filter Medium Pleated glassfiber/carbon core/filter protector
Removes/Destroys Protozoa and Bacteria
Pump Force Not applicable
Pump Strokes Per Liter Not applicable
Output 2 liters per minute
Housing Material (Waterbag) nylon
BPA Free Yes, Yes
Field Cleanable Yes
Dimensions (Filter) 4 x 6 / (hose) 48
Weight 12.4 ounces
Rated 5 out of 5 by from I love this filter Bought this after my MSR Sweetwater clogged after a disappointingly low amount of throughput. No amount of scrubbing would make it flow more than 1.5l. Returned it and Chose the Gravity Camp for it's standing cylindrical filter. This gives a LOT of surface area for filtration, and settling sediment will not foul it's intake. I've put about 50 liters through it, almost twice what I put through the first filter. I LOVE this filter. I love that it clips right into my camelbak bladders, I love not having to pump anything, and I love how fast it flows. my only complaint is that it's not free!
Date published: 2016-01-09
Rated 5 out of 5 by from Wow is this thing fast! My dad had purchased one of the original Katadyn gravity filters and we used it all the time in the Boundary Waters. Unbelievably convenient compared to hand pumps! I bought this one, because when we have smaller groups, we don't need the full 10L capacity. Overall, I'm very impressed with this model. The window is a nice addition (though it was easy to see how much water was in it before by looking at the shape of the bag), but the biggest upgrade is the speed. This filter goes through a full thing of water in no time. Much faster than my dad's filter ever was. My only complaint is that after you scoop some water, you want to avoid setting the bag down while rolling the top. I did and it tore a section of my hose where it connects to the bag. Not a huge problem though as I pulled it off, cut out the torn section, then reattached. If you camp, buy this filter.
Date published: 2014-09-29
Rated 5 out of 5 by from Works very well Have used this twice on short backpacking trips. Very easy to use and can fill up nalgenes quickly. Can also hang it from a tree and have a good water supply 'on tap' when camping near a source. Whole unit weighs 352grams/12.4oz (bladder, hose, bag). For me, I like the convenience and speed of this product. Used it from a lake source with pretty dirty water and it was fine. No way I'd wanted to have used an electronic system or chemical drops. I had wanted to buy the pump version of their product, but REI was out of stock so I bought this instead. I'm glad I did. The weight is similar is this is far easier to use.
Date published: 2015-11-28
Rated 1 out of 5 by from Clogged day one Just like dahlberg123, I just returned from a week in the Boundary Waters. I purchased the Katadyn Gravity 6L for this trip as I was looking for an alternative to pumping. This seemed like a great idea. After filling the reservoir from the middle of Nina Moose Lake on day two, the water-flow was like an IV bag - drip, drip, drip. I didn't have another cartridge -- I original cartridge should have cleaned more water than I could possibly need for the outing. Tried to field-clean but no use. Our trip was characterized by capturing the slow drip the whole time and boiling water. I do not recommend this product.
Date published: 2015-08-24
Rated 5 out of 5 by from MUCH faster way to filter water! We brought this on a 6 day trip in the Sierras. Filtered about 20 L per day keeping a group of 4 well hydrated. This is VERY fast, it would fill a 3L Nalgene Cantene so quickly you had to pay attention or it would overflow. Other suggestions / observations: 1) To enhance the process, I brought a 2L Coke bottle with the top cutoff. This allowed us to a) fill the 6L bag even from very shallow streams and b) keep refilling the bag while it hung in a tree, and refill multiple 3L Nalgene Cantenes (which are only 2.1 oz each) 2) Bought the Platypus universal bottle adapter, which allowed us to create a sealed path from the Katadyn to the Nalgene Cantene and allow near continuous water filtering with a protected path. 3) Being able to easily filter large amounts quickly saved time not only in the filtering process, but gave us a "surplus" of clean water so we could clean dishes and even clothing faster and easier. 4) Filter only displayed some slow down on the last day, to about .5 L / min. I did not try to clean in the field. Water on this trip was generally clear. I cleaned at home and it seems to be running close to the original rate, but have not retested in the field. Only negative comment is that since the filter is in the bag itself, and the top of the bag does not seal tightly, it was moderately difficult to get a good flow rate if there was no suitable tree to hang the bag, and we had to use a rock ledge. This is relative, as even "degraded" this filter outperformed any other we have used.
Date published: 2014-08-22
Rated 5 out of 5 by from Sooo much better than pumping Why didn't they think of this 20 years ago? - takes most of the work out of filtering water - We were dealing with chocolate colored river water, so it really helps to have an additional water bag to let silt settle in before pouring into filter bag - we also used a strainer with coffee filters to pre-filter - Manufacturer should design and sell a pre-filter system to fit the top of the bag -
Date published: 2015-06-17
Rated 5 out of 5 by from Great for seven Just used this filter at Rosary Lakes in the Cascades. We had four adults and three children. It kept pith all our water needs. Really foolproof and quick. Easy to clean when we got home. Highly recommended.
Date published: 2014-07-21
Rated 5 out of 5 by from Sells itself I picked one of theses up for a week long trip in the Smoky Mountains last week. Almost everyone we stayed with at the shelters said they were going to be switching over. It was so easy and fast that the only time I didnt share water with everyone was when the trip to the water source was to far to walk for a second trip. That said I was able to fill two 70 Liter Camelbacks, cook dinner and breakfast, hot coco for two, wash dishes, and still have water to share most days.
Date published: 2015-07-20
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Can this unit readily be hung in (or on) a backpack and used while hiking? Tips for doing so?  Thank you!

Asked by: Rob7
​Yes, this filter can be hung on backpack to filter water while hiking.
Answered by: REIservice
Date published: 2017-05-04

I already own the Hiker Pro. Does Katadyn have a variant of this product without the actual filter?

Asked by: natec
Unfortunately, we do not stock this item without the filter. We recommend contacting the Katadyn directly for additional information.
Answered by: REIservice
Date published: 2017-04-24

I can't find replacement filters anywhere online or in store -- are they available?

Asked by: MikeCB
The base camp uses the field cleanable Hiker PRO cartridge. This can be ordered from Katadyn:
Answered by: REIservice
Date published: 2017-04-01

I'm wondering why REI identifies the Katadyne's Water Filter System best use as "camping" and not "backpacking?" Is there a particular reason?

Asked by: rtheyden
Large capacity gravity filter systems are often aimed toward larger groups of campers due to the higher output. This filter can be used for smaller groups and solo backpacking as well.
Answered by: REIservice
Date published: 2017-05-24

About how many gallon can you run through before needing to replace the filter? Does it clog up easily or for a while?

Asked by: Peter from Provo
If the water is generally clear, the filter should clean up to 1,500 gallons. If the filter does clog up, this filter is easy to clean. The clearer the water, the less chance of any clogging problems.
Answered by: REIservice
Date published: 2017-04-01
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