REI.com
  • Online: www.REI.com
  • URL for this product:
  • From the U.S. and CanadaCall 1-800-426-4840
  • Mon. through Sun., 4 a.m. through 11 p.m. PT.
  • InternationalCall 1-253-891-2500
  • Mon. through Sun., 4 a.m. through 11 p.m. PT. English language only.
Platypus GravityWorks Water Filter

    Platypus GravityWorks Water Filter

    • $119.95
    5
    (43)

    Item # 813799

    Product size and color
    • 100% Satisfaction Guaranteed
    • Gear and Advice You Can Trust

    This item ships for free! Learn more

    To view videos or use the zoom feature on REI's websites, please download the latest version of Adobe Flash Player.
    _

    • NOW PLAYING

    The Platypus GravityWorks™ water filter delivers 4 liters of potable water in just 2.5 minutes without requiring a single pump stroke.

    • GravityWorks filter combines the speed and utility of the original Platypus CleanStream™ gravity filter with less weight and improved durability
    • System includes two 4-liter reservoirs, 1 for dirty water and 1 for clean water; reservoirs have hang loops for easy in-camp use
    • To use, simply fill the dirty reservoir with water and hang it above the clean water reservoir to let gravity carry water through the filter
    • Hollow fiber filter technology offers a high flow rate of 1.75 liters per minute—that's 4 liters in 2.5 minutes!
    • Filter physically removes particles, protozoa, and bacteria down to 0.2 microns in size, including giardia, salmonella, cryptosporidia and others
    • Dirty reservoir features a quick-disconnect valve that automatically shuts off the flow of water when the hose is disconnected
    • Shutoff hose clamp on the clean water hose allows on-demand water control for filling bottles; clamp also shuts off the system when not in use
    • Clean the system by simply holding the clean reservoir above the dirty reservoir to backflush the filter
    • Reservoirs feature SlimeGuard™ antimicrobial treatment for taste-free performance
    • Platypus GravityWorks™ water filter system is compatible with Platypus Bottles, Water Tanks™ and Big Zip SL™ reservoirs, all sold separately

    Please note: Platypus products can only be shipped to U.S. addresses.

    Made in USA.

    Item 813799

    $23.99

    with coupon code ANNV13
    May 17-27 Details

    Not a member? Add a Membership

    REI Membership

    Related items

    People Also Viewed

    Platypus GravityWorks Water Filter Specs
    Specification
    Description
    Best use
    Backpacking
    Gravity
    Hollow fiber
    Protozoa and bacteria
    1.75 liters per minute
    ABS plastic
    Yes
    (Filter) 2 x 8.5 / (reservoir) 17.7 x 9.1 inches
    10.6 ounces
    Filter type
    Filter medium
    Removes/Destroys
    Output
    Housing material
    Field cleanable
    Dimensions
    Weight

    Platypus GravityWorks Water Filter Customer Reviews

    REVIEW SNAPSHOT®

    by PowerReviews
    Platypus GravityWorks Water Filter
     
    4.7

    (based on 43 reviews)

    98%

    of respondents would recommend this to a friend.

    Pros

    • Easy to use (40)
    • Good quality (34)
    • Lightweight (29)
    • Compact (20)
    • Improves function (7)

    Cons

    • Heavy / bulky (5)

    Best Uses

    • Hiking (39)
    • Travel (10)
    • Hydration packs (9)
    • Backpacking (5)
    • Canteens & coolers (4)
      • Reviewer Profile:
      • Avid adventurer (24), Casual/ recreational (16)
      • Was this a gift?:
      • No (39), Yes (3)

    Reviewed by 43 customers

    Sort by

    Displaying reviews 1-10

    Back to top

    Previous | Next »

     
    4.0

    Served us well in SE Utah

    By TheJourneyIsHome

    from Boulder, CO

    About Me Avid Adventurer

    See all my reviews

    Verified Buyer
    Site Member

    Pros

    • Compact
    • Easy to Use
    • Good Quality
    • Lightweight

    Cons

      Best Uses

      • Hiking/Camping

      Comments about Platypus GravityWorks Water Filter:

      With clear water and a fresh filter the 4gal in 2.5 minute time is pretty accurate. With dirty water it can slow a lot, but try back-flushing and making sure as much air is out of the tubes as possible which seems to help. Ideal for a group backpacking, but if water quality is suspect, bring a second replacement filter or two of these units for a group.

      Comment on this review

      (2 of 2 customers found this review helpful)

       
      5.0

      Worth EVERY Penny

      By WayneLove

      from Morrisville, NC

      About Me Avid Adventurer

      See all my reviews

      Site Member

      Pros

      • Easy to Use
      • Good Quality
      • Lightweight

      Cons

        Best Uses

        • Hiking/Camping

        Comments about Platypus GravityWorks Water Filter:

        After years of growing up watching my dad pump water by hand, I knew there had to be a better option. This is hands down the only way to maintain a clean water supply. Although some have complained about the size and quantity of the bags, I've found them quite useful. On trips where camp is not next to water, I'll take the whole system with me to the water supply. I'll filter the first dirty bag, refill it and carry a bag of clean and a bag of dirty back to camp. It's nice to be able to bring back 8 liters for easy access. Especially when I'm the only one in a group of 4 or more with a filtration system. Of course if that's not your thing, modify what you take. Leave the extras behind. To the folks at Platypus, please don't reduce this system. It's perfect as it is! If anything, offer an additional smaller system and create another option for people wanting something simpler.

        • Was this a gift?:
        • Yes

        Comment on this review

        (2 of 2 customers found this review helpful)

         
        5.0

        GREAT PRODUCT

        By Tin Cup

        from Moore, SC

        About Me Avid Adventurer

        See all my reviews

        Site Member

        Pros

        • Easy to Use
        • Good Quality
        • Lightweight

        Cons

          Best Uses

          • Hiking/Camping

          Comments about Platypus GravityWorks Water Filter:

          I Was recommended this filter by a more experienced hiker. Went hiking with a group of 7 hikers. While all the hikers that had the pump filters were working themselves to death after a long day of hiking. I filled one bag, hung it on a tree branch and ate a snack for a couple of minutes and my water was ready to go. Simple.

          • Was this a gift?:
          • No

          Comment on this review

           
          4.0

          I Love Gravity

          By zb1ll

          from Folsom, CA

          About Me Avid Adventurer

          See all my reviews

          Site Member

          Pros

          • Compact
          • Easy to Use
          • Good Quality
          • Lightweight

          Cons

            Best Uses

            • Backpacking

            Comments about Platypus GravityWorks Water Filter:

            I bought this when it first came out. I see they got rid of the openable top on the clean bag, that's a plus. My only gripe is the ziploc is very difficult on mine to close and open, but with never having to pump, it's a godsend. I will have to see if I can upgrade my clean water bag to the new design.

            • Was this a gift?:
            • No

            Comment on this review

            (1 of 1 customers found this review helpful)

             
            5.0

            Enough Water for All

            By sierrafreak

            from Big Bear, Ca.

            About Me Avid Adventurer

            See all my reviews

            Pros

            • Easy to Use
            • Good Quality
            • Lightweight

            Cons

              Best Uses

              • Hiking/Camping
              • Hydration Packs

              Comments about Platypus GravityWorks Water Filter:

              Did 600+ miles in the Sierras last year with this filter and it worked perfect. It's easy to use and it kept enough water available for 4 or 5 people all the time.

              Used the clean and dirty bags as hydration reservoirs also in the Grand Canyon in Jan 2013. Carried enough water for 4 people to dry camp 1 night. Awesome filter!!

              • Was this a gift?:
              • No

              Comment on this review

               
              5.0

              Great for basecamp

              By To Africa and Back Again

              from Denver, CO

              About Me Avid Adventurer

              See all my reviews

              Site Member

              Pros

              • Easy to Use
              • Good Quality
              • Improves Function

              Cons

              • Bulky

              Best Uses

              • Canteens & Coolers
              • Hiking/Camping
              • Hydration Packs
              • Travel
              • Water Bottles

              Comments about Platypus GravityWorks Water Filter:

              I have used this everywhere from the mountains of New Mexico to the jungles of India. It is a bit bulky but great for basecamp use. I will be leading a backpacking trip for over 30 college students in the spring and we will definitely be carrying these.

              • Was this a gift?:
              • No

              Comment on this review

              (3 of 3 customers found this review helpful)

               
              5.0

              Effective and Easy to Use System

              By Deaconfan

              from Raleigh, NC

              About Me Casual/ Recreational

              See all my reviews

              Site Member

              Pros

              • Easy to Use
              • Good Quality
              • Improves Function

              Cons

                Best Uses

                • Hiking/Camping

                Comments about Platypus GravityWorks Water Filter:

                At the time that I bought this system, I had been considering one of the many pump style filters on the market. One of my backpacking friends suggested that I purchased a gravity-based system. Having used the product, I am pleased with what I bought.

                Here is what I liked about it:

                -- 4 ltr capacity of clean water bag. I used this system after a long day on the trail, at a camp site where the water source was not nearby. It was nice to make one trip to the water source and get all the water we needed for cooking, cleaning, and replenishing our water bottles. The 4 ltr clean water capacity is especially nice if you are hiking with a group...this way only one person has to carry the water filter and there is enough clean water for everyone's needs.

                -- Dispensing the clean water out of the tube. This is handy because you can dispense the water as you need it. Put a little in a pan for cooking, use a little for cleanup, then fill water bottles as needed. The tube feature also allows you to re-fill water bottles of a variety of sizes, whereas some pump filters require you to use a proprietary size bottle opening.

                -- Easy to use. You fill the dirty water reservoir, unclip the pinch valve on the hose, and then gravity does all the work. 4 minutes later you have a large supply of clean water for use at camp.

                While I am pleased overall with this product, here are the minor drawbacks in my opinion.

                -- Price. It is a bit expensive compared to what you get, but then again there are not many "inexpensive" water filtration systems on the market.

                -- Bulk. It is a bit bulky once you roll up the tubes, filter, and bags into the mesh storage sack.

                -- Drying out the clean water bag. Once I got home, I had difficulty getting all the moisture out of the clean water bag. It finally got all out when I put a plastic funnel in the spout of the bag and put the funnel end in front of a floor fan for several hours. This finally dried it out.

                I am a casual / recreational backpacker. Functionality and ease of use are the qualities that have driven my satisfaction with this product. It has worked well for me so far and I am looking forward to using it again on future trips.

                • Was this a gift?:
                • No

                Comment on this review

                (0 of 1 customers found this review helpful)

                 
                4.0

                Almost perfect

                By jstinson

                from Woodstock, GA

                About Me Avid Adventurer

                See all my reviews

                Site Member

                Pros

                • Easy to Use
                • Good Quality

                Cons

                • Bulky
                • Heavy

                Best Uses

                • Hiking/Camping
                • Travel

                Comments about Platypus GravityWorks Water Filter:

                I'm going to keep this short and simple, this product works just as advertised. It is a very simple design, so there really isn't any hidden secret's here. Sure it can probably be smaller and lighter, but it really works very well and it's about as easy to use as it gets. If I had to say something negative I would say the zip-lock closure on the dirty bag is difficult to close when the bag gets even the slightest bit cold. But other then that it is a great product.

                • Was this a gift?:
                • Yes

                Comment on this review

                (1 of 1 customers found this review helpful)

                 
                5.0

                Incredible! What a design! no pumping!

                By hiker 50

                from Ventura,CA

                About Me Casual/ Recreational

                See all my reviews

                Pros

                • Compact
                • Easy to Use
                • Effortless
                • Fast
                • Good Quality
                • Improves Function
                • Lightweight

                Cons

                • No Prefilter

                Best Uses

                • Backpacking
                • Hiking/Camping
                • Travel

                Comments about Platypus GravityWorks Water Filter:

                I have used the GravityWorks on two backpacking trips in the Sierras and it is fantastic! Why didn't someone think of this sooner? I have had four previous pump filters, each one an improvement on the previous one, but this is a revolution in filtering; no pumping! Scoop the water in the dirty bag, hook up the filter and clean bag, hang it, and wait for clean water! You don't have to wait long either, as long as, there are no bubbles in the filter hoses. Air in the lines slows or stops the process, but it is easy to get the bubbles out with a bit of squeezing and lifting of the clean bag hose before you attach it. When clear of bubbles, the flow rate is surprisingly fast. Since there is no pumping you can do something else during the filtering. How cool is that! Be aware, since there is no prefilter, you will need to strain heavy debris filled water through something like a screen or T-shirt (preferably someone else's T-shirt) before you fill the dirty bag. This is easy to do. Just loosely stretch a T-shirt over the dirty bag opening and pour the water through it with a cup or pot. Remember, the pouring device may then have water kooties, so you have to sterilize it or bag it and isolate it from then on.

                • Was this a gift?:
                • No

                Comment on this review

                (2 of 2 customers found this review helpful)

                 
                5.0

                Steve BackCountry

                By Steve BackCountry

                from Warren, Michigan

                About Me Avid Adventurer

                See all my reviews

                Site Member

                Pros

                • Compact
                • Easy to Use
                • Good Quality
                • Lightweight

                Cons

                  Best Uses

                  • Canteens & Coolers
                  • Hiking/Camping
                  • Hydration Packs
                  • Running
                  • Travel
                  • Water Bottles

                  Comments about Platypus GravityWorks Water Filter:

                  Just got back from 5 Nights in the Porcupine Mountains, MI..5 adults and one teen..Everyone had filters but when I used this for the first time that was it..Everyone used this filter..First few nights we were on a Creek and the last nights at Mirror Lake..At the lake I put on the Carbon Element for taste..It did slow the flow down but still all you have to do is walk away and do something else.We used this for all of our water , drinking, hydration packs, cooking etc..And for the Dude that used this for Car Camping and gives a bad review, Really ,car camping..I also have a brand new Mini Works and never took it out..And what we really want from Platypus is, KEEP UP THE GREAT WORK..

                  • Was this a gift?:
                  • No

                  Comment on this review

                  Displaying reviews 1-10

                  Back to top

                  Previous | Next »

                  How are we doing? Give us feedback on this page.

                  REI Anniversary Sale May 17–27. Plus, members SAVE 20% on 1 full-price item with coupon code ANNV13. Details

                  • Join REI today!
                  • REI Membership
                  • REI member benefits include an annual refund (typically 10% on eligible purchases).
                  • Join REI today!
                  • Sign up for REI Gearmail®
                  • and get 15% off selected items!
                  • Store Locator
                  • Locate an REI store near you.
                  • Find a Store

                  Find REI on: FacebookTwitterYouTubeFlickr