Platypus GravityWorks 4.0L Filter System

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  • Platypus GravityWorks 4.0L Filter System
  • GravityWorks™ 4.0L Water Filter
  • Platypus Gravityworks Water Filter Review
  • Platypus GravityWorks 4.0L water filter system
  • Platy™ How To: Get the most from your GravityWorks™ 4.0L Water Filter
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  • Platypus GravityWorks 4L Water Filter
  • Platy™ How To: Care and Maintenance of your Platypus™ GravityWorks™ Water Filter
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BEST WATER FILTRATION – VOTED BY CONSUMER CHOICE
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Amazon Price: N/A $119.95 (as of August 17, 2017 3:25 pm – Details). Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on the Amazon site at the time of purchase will apply to the purchase of this product.

FEATURES of the Platypus GravityWorks 4.0L Filter System Filters four liters in 2.5 minutes Weighs in at just 10.75 oz (305 g) 8 liter capacity allows you to easily transport and store water for large groups Backflushes in four seconds, maintaining optimal performance with no additional parts or tools required Proprietary Platy zip opening collects water easily, even in a pinch or crappy conditions Clean storage reservoir with shutoff clamp allows for easy dispensing Meets all EPA and NSF guidelines for the removal of Bacteria and Protozoa, including Giardia, Cryptosporidium, E. coli, Salmonella and Cholera Clip webbing strap for easy handling, lifting, and carrying Bold and color-specific "DIRTY" and "CLEAN" graphics for quick identification Corner mounted valve for better packing Field cleanable design Made in USA of US and imported parts

Product Details

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  • ASIN: B00J4022FS

Customer Reviews

Convert your GravityWorks into a Basecamp Spigot and Hydration Bag Refilling Station (see image)

35 people found this helpful.
 on March 29, 2015
By M. Gladden
A very simple and efficient way to create a basecamp spigot and hydration bag refilling station (see image for details). Just add a few inexpensive hydration tube quick-connect adapters to the clean filter line and to your backpack’s hydration bag line and you’re in good shape even for trekking/expeditions. But I would not bring this setup to a place where I did not know moderately clean water existed unless you a) want to clog your hallow-fiber filter and b) have a way of accessing very low or no-flow water sources (ultra-thin creeks or pooled water down below boulders/crags). For those applications, a hose and a pump are more reliable (I use Katadyn). But I always bring the GravityWorks when I know there’s a reasonable water source.

) It worked great! My only complaint is that the cleaning process …

16 people found this helpful.
 on September 20, 2014
By Bobb L. Bittner
I used this as my primary water filter on a 4-day kayaking trip. (It was on a well-traveled river, so I also used chlorine tablets overnight, just to be safe.) It worked great! My only complaint is that the cleaning process is somewhat tedious, because the “Clean” bag doesn’t have an accessible interior. Dirt that gets in there is tough to get out, and the drying the inside of the bag takes forever.

5 Stars PLUS!

2 people found this helpful.
 on January 10, 2017
By Gulf War Vet
Just finished a 4 day backpacking trip on the Ouachita Trail in Arkansas and this system is AWESOME! We were sub zero (C) for over 2 days and this worked like a champ! Few caveats. 1. Make sure you do at least a 4 second back flush, it really helps. I usually backflushed 30 seconds or so 2. Also remember to keep your eye on the $100 plastic cap that seals the CLEAN water bag once you are through filtering. It’s very small and easy to lose. 3. The clean water comes into the CLEAN bag at a 90 degree joint. That can “kink” on you. Keep your eye on that. 4. In very cold weather make sure to completely dry out the gray snap lock at the outlet of the DIRTY bag. It can freeze up on you. Kept the filter under the shell next to my body and it filtered water in single degree temps. It’s fast and serves up a ton of water in no time. Yeah it’s a little pricey, but well worth it. I would give it six stars if I could. Platypus has hit it out of the ball park with this.

Best Water Filter on the Market (Not Perfect – Just the Best)

22 people found this helpful.
 on September 27, 2014
By Kerry C Keen
Must have rushing water to fill up reservoir or use a rigid container to scoop out water and pour that into the reservoir. Back-flush the filter with clean tap water regularly to maintain fast flow through the filter. The water source needs to be several inches deep.

I finally found a system that I really like. previously I used a Katadyn hiker pro and …

 on June 14, 2016
By Gordon H. Ripley
As a hiker who has done the AT, the Long trail and 200 miles of the Colorado trail, I finally found a system that I really like. previously I used a Katadyn hiker pro and always grumbled at the end of a days hike when I had to PUMP that device to fill up my platypus bags. After a days hiking I am usually tired and energy is lacking. I should add that I am now 77 so maybe that explains some of it (so you young “lions” can go on using your PUMP water filters they are great too). With this unit you simply fill the top bag and hang it up. Within a very short time you have clean, filtered water. One CAVEAT: You have to carry a plastic cup to use to fill the top bag because water sources are not always easily accessible. A plastic cup only weights a couple of ounces so for me, anyway, that is not a problem. One last note. With any water filter that uses a cartridge (this one & the Katadyn are examples) be aware that in Colorado and other mountainous regions there may be SILT in the water that will clog your cartridge making the filter unusable. This happened to me on the PLATTE river. I should have found a quiet “pool” and not filled in the swift current. just an FYI.

This thing is AMAZING and QUICK!

 on December 4, 2015
By J. Alderson
This is AWESOME for groups. We do a family backpacking trip to a lake in Yosemite every year or two – and we can have more than 15 people there at a time. This means we have had to take turns pumping and sharing just 2 or 3 filters and it takes FOREVER. This sweet setup takes hardly any time… just scoop up some water and filter away. I think this would be helpful even with 2 people since it’s super quick and then you’d be able to fill your water bottles and have water for cooking. It’s also nice because you can store water in the clean water bag and refill as needed.

No Brainer Purchase

 on July 5, 2017
By Daniel Nye
This thing will ruin you for “pumping” water. If you can open a zip-lock style bag and read very simple instructions you can have clean, drinkable water in just a few minutes. It works FAST, I think it may have taken a minute and a half to filter 4 liters of water from a clean mountain spring. Oh, and it’s lighter than must pump setups with the added bonus of having two reservoirs. You can have access to ~8 liters of clean water on the trail if you fill up both reservoirs.

Stop using your puny human muscles like a sucker!

 on July 6, 2017
By Pope Brak
This thing is really fantastic. I’ve used Sawyer squeeze bags and Katadyn water pump filters for years, but have always been frustrated by the tedium of them. On a 5-day kayaking trip with 6 people, last year, our pal’s 14 year-old nephew complained so much about having to filter water that he earned himself the nickname ‘Pumper.’

The best investment I have ever made

 on July 16, 2016
By Justin
The best investment I have ever made, with one caveat – see below. We have used squeeze bottles, pumps, and tablets. This is the easiest way I have ever purified water without the taste from tablets. I have no idea why it took so long to invent this modern marvel! Assuming they aren’t lying about the filter doing what it should, it gets through the whole dirty reservoir in 5-10 minutes, based on how silty it is when you put it in. You should follow the instructions for backwashing initially, and for stopping the flow before the very end of the dirty reservoir is used up (usually the dirtiest water) and for backwashing a 2nd time at the end. If you do this, the filter should keep working at peak performance.
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