Pumping makes God cry.
- Filter removes particles, protozoa, and bacteria down to 0.2 microns in size
- Dirty reservoir’s quick-disconnect valve automatically shuts off the water flow when the hose is disconnected
- Shutoff clamp on the clean water hose allows you to control water flow for filling bottles and shut filter off when not in use
- Reservoirs feature SlimeGuard antimicrobial treatment to eliminate blecky tastes
- Compatible with Platypus Bottles, Water Tanks, and Big Zip SL reservoirs, not included
- Clean by holding the clean reservoir above the dirty reservoir to backflush the filter
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Share your thoughts
- Familiarity: I've used it several times
This is a well constructed system that filters 4 liters in minutes. The cleanside hose has a screw top connection that is compatable with the plusBottle, 2L Platy bottle and the Hoser bladders in addition to many more Platypus products.
I have tweaked my setup by swapping out the filter opting to use the Sawyer PointONE filter instead. The weight is 1.8 oz for this filter compared to the Platypus which is 1.9 oz. The Sawyer filter is guaranteed for 1 million gallons compared to the Platypus 1500 liter filter life. This setup does require use of the Platypus or Sawyer quick disconnect fitting to connect the hoses to the filter. With some shortened hoses the total weight on my scale is 9.74 oz.
The bladders will do their job as expected if you treat them right and maintain them like any other piece of gear you depend on in your gear arsenal. This is without a doubt money well spent and I would buy it again when it comes up missing or needs to be replaced.
- Gender: Male
- Familiarity: I've used it once or twice and have initial impressions
Incredibly fast, Lightweight enough if you're not too picky, clean water. Love it. Would recommend.
The GravityWorks is very easy to use and maintain. I filled up the bag from the lake, hung the filter in a tree, and walked away. It filtered the 4 liters in minutes. And I loved that I didn't have to pump anything! I came back and filled up my Nalgene with no effort whenever I was thirsty. Definitely a must have for any backpacker or camper camping near water.
How much use do you get before you need to replace the filter? (I didn't see this in other reviews or the info. Sorry if it's already been covered and I didn't see it).
Depends on the quality of water you're filtering to begin with and how often you back flush the cartridge. Running silty crap through it might give you only a few gallons, but under considerably better conditions, you should expect about 1500 liters or somewhere just south of that. I've used a MSR Autoflow gravity type filter system (also Cascade Designs) for a couple of years now and I'm absolutely thrilled and impressed by how easy, efficient and effective it's been. Bottom line: you won't be disappointed!
I love the fact that you never have to pump. The filter is lighter then 90% of the filter on the market. The filter is 1.5 times faster then most of the filters on the market. It packs down really small. Plus no pumping. To clean all you have to do in reverse the flow to back flush. I have been using this for about 2 years and can rave enough about this product. I have been on backpacking trip with 10 people and we used this one filter only for the trip. After the trip almost everybody asked what that filter was because they wanted one. The filter does not have a carbon filter that comes with it, but this year they introduced a carbon element as an accessory.
I love this filter!! When it comes to clean water on the trail, I'm not interested in taking any chances. The Platypus filters 4 liters in a couple minutes. I've put some seriously sketchy water through this filter and it has come out absolutely perfect. Another nice feature is that you can use the "Clean" bag as your backpack water bladder during the day and then hang the rig on a tree at night for your camp water, basically saving you the hassle of carrying an extra bladder in your back pack.
You will get about 1500 Liters per filter.
I love the ease of this filter but am bothered by not being able to open the "clean" bladder for cleaning and drying. When I store it, it doesn't dry, and develops a moldy-musty odor, even though I have treated it with bleach water prior to storing. Anyone been able to solve this problem?
your comment is very confusing. the clean bladder opens up the same as the dirty bladder. are you sure you don't have some other system?
I know what he means. I had to prop it open in the sun for quite a while before it dried out. Love it though.
I dry my clean reservoir in three steps: 1. Clean/rinse and then invert/drain/dry for 6-12 hours to get most water out; 2. Insert two re-formed coat hangers through the cap opening and lay reservoir horizontal; 3. I've rigged a small fan to introduce a modest amount of air through the cap opening. Mine is clean and bone dry in less than than 12 hours. Another option, I think, would be to clean/rinse/drain and then flatten and store in the freezer. It'll thaw quickly when you remove for your next adventure.
My GravityWorks system came with a "zip" dirty reservoir and a "non-zip" clean reservoir. The current owners manual shows the same configuration (see pic below). Perhaps they changed product so that both reservoirs have zip access. I prefer the non-zip reservoir for my clean side - it's about an ounce lighter than the dirty zip reservoir and there's little chance that you'd accidentally dip the clean reservoir in water source (because it doesn't have the large zip opening).
Hope I can clarify this thread... The clean bladder does not have a zippered opening (I checked out one on the shelf at REI in Madison, WI yesterday). I visited the Platypus website again a few minutes ago and all current pics and descriptions show that clean bladder does not have a zippered opening. See my 8/20/12 response for more info. See pic below (shows zippered dirty bladder and non-zippered clean bladder).
The original CleanStream did have a zippered opening on the clean bag. The GravityWorks does not. Inverting the bag on a Kitchen bag dryer works well to get the bag mostly dry, then just hang it out of the way for a few days and it should be good to go. Otherwise, for a quicker solution, lay it flat in the bottom of your freezer. That will keep the critters at bay and takes up almost zero space.
According to the Platypus webpage, the clean bag does not have a zipped opening by design. This is to prevent the possibility of cross contamination from accidentally using the clean bag to collect source water.
I LOVE this filter. I had a Katadyn base camp filter, but couldn't get a good seal where the filter attaches to the bag, so returned it. The platypus filter though, I've loved from the first moment I used it! I usually leave the 'clean' bladder at home, and just directly fill up my bottle/bladder in my pack - which means the filter weight is right around a half pound.
We took this filter to Nepal last month on our Everest Base Camp trek, and it more than paid for itself by allowing us to filter water rather than have to buy bottled water the whole way up.
If and when my current one dies, I will be replacing it with another.
I've seen a couple people post that you can carry up to 8 liters of water back to camp by filling both bladders with water. So I guess you have to somehow hold up the bladders while they filter and then refill the dirty side while you are at the water source?
That would be correct.
I used this filter to supply water for 7 people (total) over the period of 2 weeks of backpacking in summer of 2011. The Platypus GravityWorks filtration system may be the best backcountry water filter system out there. It's light (under 11 oz.), fast (4 liters in 2-1/2 minutes) and flexible (you can carry up to 8 liters into camp). I use the GravityWorks clean reservoir as my hydration bladder, thus, eliminating the weight of my 4 oz hydration bladder (in other words, the GravityWorks is really only an additional 7 oz. to my previous pack with hydration bladder). Regarding filtration speed, this system is rated at 1.75 liters per minute (LPM), the same as the fastest pumping systems out there. And... while the water is filtering, by gravity, I can take care of other backpacking tasks - try doing that next time you're pumping 4 liters of water by hand! Lastly, with a 4 liter dirty reservoir and a 4 liter clean reservoir, you can carry up to 8 liters to camp (especially useful for nights where you're camping above a water source). This system is super-convenient for dispensing clean water at camp (i.e. hang the 4 liter clean reservoir and use outlet tube to fill water bottles, pots/pans, etc.).
Look for Platypus' ad campaign for this product in magazines (like Backpacker). All of their claims are true!
I have backpacked for over 25 years and have previously used First Need Deluxe, Katadyn Pocket, Katadyn Hiker and MSR Hyperflow pump filters. The First Need Deluxe and Katadyn pumps were reliable filters but required a lot of stooping and elbow grease. These filters were also fairly heavy. The MSR Hyperflow was light and fast, but was prone to failure (see my, and others', review(s)). Note: The Platypus GravityWorks system uses the same filter (hollow fiber technology) as the MSR Hyperflow but I have experienced none of the Hyperflow problems with the GravityWorks system. I'm sure success of GravityWorks can be attributed to its gravity operation and to Platypus' EASY instructions for quickly backflushing air bubbles out of the filter inlet (something you can't do, to my knowledge, with the Hyperflow).
I highly recommend the Platypus GravityWorks filter system.
Is there a shutoff for the dirty hose so that if there is still water in the dirty bag and one wants to fill a bottle from the clean bag, the flow to the filter can be temporarily stopped?
Should a person purchase an extra filter or any other parts as a backup at the time of purchasing the system, or do the parts/filters last through lots of water filtering?
There is one shutoff included with the system. I typically locate my shutoff in the outflow tube between the dirty reservoir and the filter cartridge. I do this, in part, because I use the clean hose and the clean reservoir (with a bite valve) as my hydration bladder during the day.
I do hang the clean reservoir (say, at camp) to dispense filtered water. I simply loop the clean output hose up and over the same branch that supports the clean reservoir (the clean output hose wraps above the water level inside the clean reservoir). The only danger is that the clean output hose would get bumped or blown off the branch and would accidentally drain clean water to the ground (so far, not a problem for me). As you've mentioned, one could move the shutoff from the dirty reservoir output to the clean reservoir output (or simply buy another shutoff) to prevent accidental water loss.
Hope this helps.
Also - If you disconnect the hose from the 'dirty' water bladder, it won't leak/empty out. It's got a one way valve in the connection. I typically take just the dirty bladder to the water source (so i don't drop/contaminate/break the filter and hoses) then lug it up to camp to filter.
About the same weight as the pump filters, minus the pumping. Great to be able to just fill the "dirty" side and then let it do its thing while you grab some lunch or setup camp. As mentioned in the other review the more vertical you have it the faster it pumps.
Love this thing. Super easy to fill and then sit back and do other things while it filters. Even doing the backflush, though, filtration gets quite slow after a few days. A spare filter would be awesome to have, but I don't see them on BC.com??
Works best when the system is hung completely vertical as opposed to laid across a steep slope.