How to Choose a Water Filter or Purifier
Platypus GravityWorks Water Filter System - 4 L
$134.95
Members get an est. $13.49 in rewards
Filtering up to 1.75 liters a minute without any pumping, the high-capacity Platypus GravityWorks 4-liter water filter system is an easy, fast way to get filtered water in the backcountry.
- System includes two 4-liter reservoirs (1 for unfiltered water and 1 for clean water); reservoirs have hang loops for easy in-camp use
- To use, simply fill the unfiltered-water reservoir with water and hang it above the clean-water reservoir to let gravity carry water through the filter; no pumping required
- 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 more
- Unfiltered-water 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 unfiltered reservoir to backflush the filter
- Microfilter lifetime of up to 1,500 liters
- Reservoirs feature SlimeGuardâ„¢ antimicrobial treatment for taste-free performance
- Platypus GravityWorksâ„¢ water filter system is compatible with Platypus Bottles, Water Tanksâ„¢ and Big Zip SLâ„¢ reservoirs (not included)
Made in USA.
View the Platypus GravityWorks Product LineView all Platypus Gravity Water Filters| Best Use | Backpacking |
|---|---|
| Filter Type | Gravity |
| Filter Medium | Hollow fiber |
| Removes/Destroys | Protozoa And Bacteria |
| Output | 1.75 liters per minute |
| Housing Material | Polyethylene |
| BPA Free | Yes |
| Field Cleanable | Yes |
| Dimensions | Filter: 2 x 8.5 inches; reservoir: 17.7 x 9.1 inches |
| Weight | 11.5 ounces |
Buying Advice
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Most Helpful Favorable Review
Takes time, but not YOUR time
David P3 months ago
Used this at a camp out where I saw probably 8 other systems also being used, including pumps, squeeze bags, gravity bags without a clean bag, etc.
Everyone left the camp out planning to buy one of these because you just fill the dirty, get them hanging appropriately, and come back after you e done some other tasks, and you have a bunch of clean water. No hard pumping or squeezing or anything else.
Great system!!!
David P
CA
8 people found this review helpful
Most Helpful Critical Review
Water supply for base camp
GoOutsideMom2 months ago
PROS
*good for passively replenishing the group water supply at base camp.
*The dirty water reservoir has a wide easy to fill opening with a slider closure.
CONS
*Clean reservoir is nearly impossible to dry out for storage (a week of daily shaking and trying to keep bladder from sticking to itself).
I imagine they designed the clean reservoir so you wouldn't accidentally fill with dirty water, but it would be nice to have a slider opening on the clean reservoir (The dirty reservoir was easy to clean.)
GoOutsideMom
MI
4 people found this review helpful
David P
California
Takes time, but not YOUR time
3 months ago
Used this at a camp out where I saw probably 8 other systems also being used, including pumps, squeeze bags, gravity bags without a clean bag, etc. Everyone left the camp out planning to buy one of these because you just fill the dirty, get them hanging appropriately, and come back after you e done some other tasks, and you have a bunch of clean water. No hard pumping or squeezing or anything else. Great system!!!
Age:35–44
Yes , I recommend this product
Camplifer
Oregon
Excellent for camp life
1 month ago
It is a great filter with proper care. I use this for backpacking as well as for touring and living the camp life. I use it to fill mt 7 gallon eater container and it goes pretty quick once you get the "hang' of it. ;) Only downside, my clean bag had a strong plastic odor/taste, I have cleaned it with baking soda and it has improved but still has a faint taste. I do have faith that the clean bag will become neutral eventually but note that it does require cleaning prior to use...
Age:35–44
Yes , I recommend this product
GoOutsideMom
Michigan
Water supply for base camp
2 months ago
PROS *good for passively replenishing the group water supply at base camp. *The dirty water reservoir has a wide easy to fill opening with a slider closure. CONS *Clean reservoir is nearly impossible to dry out for storage (a week of daily shaking and trying to keep bladder from sticking to itself). I imagine they designed the clean reservoir so you wouldn't accidentally fill with dirty water, but it would be nice to have a slider opening on the clean reservoir (The dirty reservoir was easy to clean.)
Age:55–64
No, I do not recommend this product
Papa Steve
Duluth, MN
Great filter for group camping
7 months ago
A friend lent me this filtration system last summer. I went up into Voyaguers with my wife and son (11yo). It filtered water well, and was great for us for cooking, brewing coffee, washing up. I loved this and plan to get one for myself!
Age:35–44
Yes , I recommend this product
Occasional backpacker
Poor filter
1 week ago
Bought this 5 years ago, only used it a few times and followed the clean/care instructions meticulously. After testing it before a backpacking trip this week found the filter clogged and we were unable to use this system. We've tried everything we can find to unclog the filer without success. Have contacted the company, still waiting for a reply as to how to fix the filter. Too expensive to fail so quickly.
Matt
Montana
Plugs too easy -- even with frequent backflushes
1 month ago
I have used this system for 8 years. There are very few outdoor water source that will not plug this filter after about 100 liters. Yes, I know how to backflush the filter to clean it. The only solution was to insert the MSR silt stopper filter between the dirty bag and the main filter this worked great. I could change the cheap silt stopper cartridge and make the more expensive platypus filter last a long time. Unfortunately it's impossible to find the MSR silt stopper replacement filters. So, after a one last frustrating group trip where I burned through 2 filters and barely eked out enough water keep the group hydrated -- the platypus system is gone. I can't find another inline pre-filter like the MSR silt stopper, so I'm going to have to find a different system entirely.
Age:45–54
No, I do not recommend this product
Gearbuyer
Plastic taste
2 months ago
I have purchased many of these, and generally recommend this. However, I just bought one with a strong plastic taste. I am trying to clean it, not sure if it is safe to run baking soda through the filter. If I can fix the bad taste I will fix my review
No, I do not recommend this product
freeflying monkey
CA
Works well, lightweight
1 month ago
Used a friend’s on a previous trip and really liked it AND it worked the whole time. Bought a life straw gravity system, but really missed having a receptacle for the water to flow into especially for filtering overnight so you could wake up and have water ready for you for breakfast. Haven’t used the new one I bought yet, but assured that it will be successful.
Age:45–54
Yes , I recommend this product
David H.
Super easy. Was a hit on our trip whwn others had pumps
2 months ago
This is the easiest and quickest water filtration system I've used. Four of us biked to Goldmyer Hotsprings for a few days and this kept all of our water bottles filled and cooking was a breeze with this easy system of using gravity.
Originally posted on a Cascade Designs brand site
Northern Woman
Michigan
Easy filtering
1 month ago
Easy to set up and use. Quick filtering and easy to backwash for cleaning when the flow slows down. Rolls up nicely and easy to get back into its carrying bag.
Age:55–64
Yes , I recommend this product
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