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Platypus GravityWorks 4.0L Filter System

$109.95

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    $109.95

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GravityWorks 4.0L Filter System

If the GravityWorks 4.0L Filter System is pretty dang easy to operate, and there are plenty of devotees who can't get enough of the world's simplest water filtration system. Just fill one of the Platy Zip bags with water, place it above the empty bag, open the hose clamp, and let gravity do the rest. In 2.5 minutes, you'll have four liters of clean water, and if camp is far away, fill the other bag to carry back with you and clean when you need it. Open the hose clamp to dispense water, and shut it to stop the flow. To clean, simply reverse the bags for four seconds, running water through the filter in reverse. That's seriously it.

  • Two 4L Platy Zip bags
  • Filters 4L in 2.5 minutes with no pumping
  • Meets all EPA guidelines for removal of bacteria and protozoa
  • Shutoff valve for easy use
  • Four-second reverse-flush cleaning
  • Item #CAS001G

Purifying Element
hollow fiber
Eliminates
protozoa, bacteria, particulate, giardia, cryptosporidia, E. Coli, salmonella, cholera
Cartridge Life
1500L
Flow
4L / 2.5min
Field Cleanable
yes, backflush
Dimensions
3 x 9.5in
Claimed Weight
10.75oz
Recommended Use
hiking, camping, backpacking
Manufacturer Warranty
limited

Tech Specs

What do you think about this product?

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>Rating: 4

Good water filter

Familiarity:
I've put it through the wringer

Recently used this on a bikepacking trip on the great divide. Most of the time it would take 10-15 minutes to filter 4 liters. Have to make sure you purge the air from the filter first and then back flush it when done. Zip lock on the dirty bag is not reliably secure enough to transport while full without leaking.

>Rating: 5

Perfect Water Filtration!

Familiarity:
I've used it several times

This is a simple, effective, reliable and easy to use water filtration system. We just used it along the Buffalo River in Arkansas and it filters 4L of water in just a few minutes. Highly Recommend!

>Rating: 5

Convenient and reliable

Familiarity:
I've used it once or twice and have initial impressions

Having a gravity filter automatically filtering water without a pump is certainly convenient, but what really surprised me was how effective and reliable this filter was in questionable water. We were backpacking along the Escalante, a small river that's so murky we couldn't see our feet when we were ankle-deep. I filled the bag with the brownest water I've ever filtered with doubts, but this bag provided crystal clear water, then packed down small for the trek home.

>Rating: 5

Works like a dream

Familiarity:
I've used it several times

Used the 4L version on a 3-day, 38-mile backpacking trip. We drank a ton of water and even brought a pocket shower to stay clean with. Packs down small, is super easy to use, and filters quickly. Fill the dirty reservoir with water before starting to set up camp and you'll have 4L of clean water well before everything else is set up.

>Rating: 4

Saving energy!

Familiarity:
I've used it several times

Less pumping is fantastic! Loaded this thing up for a 3 day/4 night float trip, and it did not disappoint. we had 2 rolling for 5 people and had water quickly, with drastically less effort. A great product.

>Rating: 5

Hope to never pump a water filter again!

This filter is perfect for 2-4 people. I go to my water source, and fill the dirty bag with 3ish liters. Then I filter that and fill up the dirty water bag again. so at camp I have 7ish or so liters! I cook a lot so I have pans to clean up. When you are 1/4 mile from a water source this filter is awesome! I took it out late last season for the first time. What a great filter! No more pumping water in awkward positions, or anything of the sort! I always feel like I can drink plenty of water. I have only used this at a lake, not a river, so I would guess if you had a running stream or creek of water you would fill the bag with the full 4 liters. I didn't put a stop watch on time it took to filter. But it seems to filter more quickly than my hiker or water works. Get this filter if you are hike with a group, need water for cook clean up, or camp away from your water source. Great product!!!

Awesome, Wayne! I hope you are just as stoked as me to get out for the spring. Backpacking, here we come!

>Rating: 5

Best filter I have ever got my hands on.

Familiarity:
I've used it once or twice and have initial impressions

My group of 5 used this for a 4 day backcountry hut trip and it lived up to the hype.

>Rating: 5

SO excited!

I'm so excited to use this for backpacking once the weather gets warmer. No more pumping. No more big clunky weight in my pack.

>Rating: 5

This is a brilliant filter

Familiarity:
I've used it several times

it's lightweight and easy to use. It might be more difficult to get water out of very shallow streams but for bigger streams and lakes this is a perfect tool.

>Rating: 5

Fast and amazing product

Familiarity:
I've used it once or twice and have initial impressions

Just used this over a weekend in the Pacific Northwest. This was super easy to use, produced a large amount of water quickly, and was 4 times faster than the pump style filter a friend was using.

>Rating: 5

Excited to use it

Familiarity:
I've used it once or twice and have initial impressions

I purchased this filter system after owning the Platypus hydration bladder for a few years. I love the wider opening at the top for filling and cleaning. When I was looking for a filter system, I stuck with what I liked and went with the Platypus. This will live in our camping box for this summer and I can't wait to use it.

>Rating: 5

Sent it to family in PR after Hur Maria

Familiarity:
I gave it as a gift but have feedback to share

Family reports that the system works great and its easy to use. After Hurricane Maria, the family needed a way to filter every drop used for household consumption, and this system has worked like a champ to make sure the water filters out the bacteria that causes leptospirosis. It's been a life or death situation and I'm happy to report everyone has been in good health after drinking the water filtered with this system.

>Rating: 5

Convenient and Quick

Familiarity:
I've used it once or twice and have initial impressions

I have used this a couple times backpacking in Kentucky. It filters high volume at great speed and is lightweight. Murky river water came out clear (and safe, I assume, as we did not got sick.) The wide opening helped capture a trickle from a rock overhang. So far so good.

>Rating: 5

Clean water!

Familiarity:
I've used it once or twice and have initial impressions

Easy to use, good size not to bulky.

>Rating: 4

Excellent lightweight water filter

Familiarity:
I've put it through the wringer

This is an overall excellent water filter. I have found it particularly useful on extended backpacking trips. It is totally worth the water weight it will save you. With this, I just about never find that I have to carry more than a liter or two of water, unless I am worried that water sources will be scarce. The filtration is very easy and intuitive. The buckle on the top of the bag makes it very easy to hang from a tree branch, so that you don't have to stand there holding the bag. The filtration is quite fast. It takes only a minute or two to filter 4 liters of water, so long as your filter isn't damaged or significantly clogged. Buying replacement parts is very easy. At the same time, the number of parts can make losing the parts somewhat easy. I know I lost the cap to the clean reservoir once (I did find that a regular disposable bottle cap from bottled water or soda you buy at the store can fit on just fine). I also believe they could design this using one less tube (likely the one leading to the clean reservoir), but I could be wrong, and they may have thought of that already. I would really like to find a way to feed it directly into my MSR Dromalite reservoir. Be careful not to filter freezing or near freezing water. You will damage the filter. I learned that the hard way. This filter isn't great for alpine environments for that reason. If you are near snow you can just melt that. Otherwise, you will have to put the water on a stove first to melt any of the frozen water, which can be a lengthy process. One complaint I have is that the tubes are designed with a sort of material that seems to just be a magnet for dirt and debris. I have found this kind of annoying. All said, this is an amazing filter that will clean out any bacteria and debris leaving for great tasting, clean water (note, viruses can still get through).

>Rating: 5

Easy

After using a MSR hand pump to filter my water, I decided to give a gravity filter a chance. Needless to say, it has made filtering water much easier and extremely convenient. Although it can be hard to get the dirty bag filled up with smaller water sources, a scoop of some sort has fixed that problem. I also love how I can removed the clean hose from the filter and use it to fill whatever I need, whenever I need it.

>Rating: 5

Perm out of stock??

Why?!

>Rating:

Platy Love

Staying hydrated doesn't take much work! So easy to fill up our bottles before heading out in the Lost Creek Wilderness Area.

Staying
>Rating:

GravityWorks 4L Review

>Rating: 5

This thing is amazing!

Familiarity:
I've used it several times

I have used the 2.0L which is what made me want the 4.0L. The reservoir is especially nice. This packs up pretty small and filters/holds a lot of water. Great for groups and needs little effort to use.

>Rating:

Do you have any problems using this in below freezing temps? I’m thinking of getting one for backcountry trips but I’m a little nervous of it freezing up leaving me without a filter.

>Rating:

What is the best way to dry the reservoirs? Having some trouble getting the moisture out after use.