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Filtering water has never been so easy—let gravity do all the work with the pump-free Platypus CleanStream™ gravity filter system.
Fill it, hang it, and forget it - the Clean Stream Gravity Filter from Platypus uses nothing but the power of gravity to filter four liters of water in just two and a half minutes. Keep your entire group hydrated without ever pushing a single pump, and combine storage, filtration, and delivery for worry-free hydration.
Platypus CleanStream Gravity Water Filter is a simple camp filter that can produce about a gallon of water in just a couple minutes without using chemicals or pumping. Gravity does all the work
Just fill the 4-liter reservoir labeled DIRTY with unfiltered water and place it three feet above the 4-liter reservoir labeled CLEAN, and in 2.5 minutes you have fresh water
Easy-hang strap
Filters down to 0.2 micron, removing 99.9999 percent of bacteria and protozoa
Filter life approximately 1,500 liters, depending on water quality
Hose clamp provides off-and-on demand water
Easy to clean without disassembly
Kit Includes: Two 4-liter reservoirs, fast flow hollow fiber filter cartridge, hoses and all fittings
Dimensions: 16.5 x 9 in. or 42 x 23 cm
Weight: 12.7 oz. or 360g
Don’t waste time in camp filtering water when you could be sitting around relaxing. Pick up the Platypus Cleanstream Gravity Filter System and let G-force pump your water for you. This high capacity filter cleans four liters of water in a mere 2.5 minutes and holds eight liters – enough for a full camp. Using a Hollow Fiber medium, the Cleanstream removes 99.9% of all bacteria and protozoa. The filter can be back flushed and cleaned by simply reversing the height of the reservoirs. Platypus even labeled the reservoirs Dirty and Clean so there’s no confusion when it’s time to hydrate.
Platypus Clean Stream Gravity Filter is the answer to simple, effective and fast water filtration.
| Adapter: | No |
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| Cleanable Filter: | Yes |
| Dimensions: | Filter: 5.75 x 1.75 / reservoirs: 19 x 8 inches |
| Field cleanable: | Reverse water flow |
| Filter Type: | Hollow fiber |
| Filter medium: | Hollow fibers |
| Gravity Flow: | Yes |
| Housing material: | ABS plastic |
| Manufacturer Warranty: | Lifetime |
| Output: | 1.6 liters per minute |
| Output rate: | 4 liters / 2.5 minutes |
| Pump force: | Not applicable |
| Pump strokes per liter: | Not applicable |
| Recommended Use: | Backpacking, car camping |
| Removes: | Protozoa and bacteria |
| Weight: | 12.7 ounces (empty) |
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View other products from Platypus classified in Hiking & Camping > Water Treatment. View all products from Platypus.
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Sometimes, we can't be sure that the product is the same across the stores that offer its, so you may find the same product listed more then once on GearBuyer.com, we these list highly similar products below.
 | Platypus CleanStream Replacement Filter | $39.95 |
 | Platypus Gravity Filter Replacement Cartridge | $39.95 |
 | Platypus CleanStream Replacement Hose | $15.95 |
These are products that have been indicated being comparable to this product:
 | MSR Autoflow Microfilter Hiking & Camping > Water Treatment | $78.95 - $89.95 |
 | Katadyn Base Camp Hiking & Camping > Hydration | $54.95 - $69.99 |
 | MSR Hyperflow Microfilter Hiking & Camping > Water Treatment | $99.00 - $99.95 |
 | Sawyer Water Treatment System - 4 Liter Hiking & Camping > Water Treatment | $89.95 |
This product is available in the following colors:
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I may never pump again | |
| Rating: |  |
| I've used the the Cleanstream now on at least six group/family trips and a handful of backcountry trips. I am now fully confident to have it replace my pumps for almost any trip. I am thrilled with the idea of ALWAYS having water around and not agonizing over whether to pump before bed or breakfast - with this filter, water is always on-hand or just a few minutes away from being so. I've gotten into a habit of backflushing (a.k.a - lifting the clean bag!) a little after every 4-liter run and have never had any issues. Disconnect the Clean bag from the filter when it's full and hang it for on-demand use and washing around camp - awesome. Combined with a larger reservoir for storing clean water, this system provides an endless supply. Caveats: On backcountry trips, I will continue to carry purifier drops just in case.(as I did with pumps anyway.) Freezing, dropping and clogging are all pitfalls with Hollow Fiber - but only if you don't take care of them properly. I will still use my miniworks in glaciated, tannic or otherwise challenging filtration conditions to maintain the higher degree of field maintainability, but these are the only places I'll ever pump again. I do think the zip-lock seal could be easier to manipulate. However, I put some of the food-grade slicone lube on it from my Miniworks maintenance kit and it helped a lot. Filling could be easier in slow-moving or shallow water but I just bring a pan with me if needed and it fills just fine. OVERALL: Simply the best filtration mode I've used in the last 25 years that I've been guiding or otherwise playing outdoors. Granted, I was skeptical and it just doesn't seem like that big a deal but it turned out to be. Even with all the small caveats of care, the speed and ease of this filter are well worth the added attention needed to keep it running smooth. | |
| upzmtn at REI on 08/05/2009 | |
Buy this filter | |
| Rating: |  |
| My wife and our two young daughters just finished a five day trip on the BWCA in Northern MN. Having pumped (water) our way through these trips in the past we decided to buy this filter and took a hand pump as a back-up. We never got the pump out! We filtered 2 to 3 gallons per day and never had any problems. This is a huge improvement over pumping! It is critical to purge the air from the lines between the dirty and clean water bags and the filter to get a good flow, but this is not hard. I disconnected the tube that leads from the dirty bag to the filter from its connection point at the filter, let a little water flow from the tube to purge the air, pinched it off and reconnected it. After that, the water pressure from the full dirty bag purged the air from the filter. Easy, easy. I backflushed a small (.25 liters) after each use to clear any sediment from the filter and dirty bag. While an extra necessary step, it took less than a minute, and that sure beats the heck out of pumping! | |
| Max from Alaska at REI on 07/14/2009 | |
Cleanstream Review Update | |
| Rating: | |
After using my Platypus "Cleanstream" for two outings (16L of water), I returned home, ran some clean water through it, & noticed the volume had been reduced to a trickle. I performed the back flush procedure which didn't help @ all. I then called bc.com & informed Chris of the problem, mentioning to him that I would be calling Cascade Designs. After speaking with CD, they asked me to give them the date code on the filter which was 7/28/2008, one of the first batches. (The date code can be found on the clean water side of the blue filter, underneath the rubber flap by peeling the flap back). Apparently there was a problem with some of the first units regarding flow rates. The FR problem has been resolved with all newer units. Cascade Designs is sending me a new replacement filter. BTW, bc.com was ready to unconditionally refund or replace the entire unit, no questions asked. | |
| Jeff Gerhard at Backcountry.com on 06/26/2009 | |
A step in the right direction | |
| Rating: | |
| I've used this on three backpacking trips this year and it has worked well. I love the convenience of not having to pump, plus it gives me the flexibility of bringing 8 liters of water to camp in a single trip without carrying an extra container. Zippers are a challenge, but in most cases you don't need them. I carry a couple feet of light cord to hang them from a tree. Dirty or stagnant water tend to plug it up, so a disposable or easily cleanable pre-filter would make sense to me. Backwashing is easy enough and flow resumed pretty well. Even when it was slow, who cares, it's hanging from the tree filtering away while I'm off doing other things. Purging the feed line to the filter of air is critical. Overall the best gear investment I've made in years. | |
| Soulsbyville Strider at REI on 07/30/2009 | |
Convenient and easy to use | |
| Rating: | |
| I used this on an 8 day trip with a group of 7. It was a lot easier than pumping water - hang it and (almost) forget it. When the filter is clean it's also much faster than pumping. It does require backflushing regularly to maintain the flow rate - probably every second or third time based on the lakes and streams we used. For a group as large as ours (7 people) I would recommend a secondary container for water storage convenience. Initially I was concerned about the integrity of the plastic water reservoirs, but it's all low pressure so you could do a field repair with duct tape if needed. Overall this was a huge improvement over past trips where we used a conventional filter and pumped the 1-2 gallons per person per day. | |
| BackpackinDawg at REI on 09/03/2008 | |
So easy! No more pumping! | |
| Rating: | |
| I used the "dirty" resevoir/pump and left the "clean" resevoir at home. When filtering water, I directly hooked it up to my platypus hydration bag, or directly into my pot. Used it straight from the box on a 9-day backpack trip with no problems. Easy to backflush filter in the field. You can remove the pump, use the short hose with the clamp, hang the "dirty" bag from a tree and use it as a camp shower. No cold fingers in the morning from pumping water! NICE!! | |
| jeepstergal at REI on 09/28/2008 | |
Hassle Free Water | |
| Rating: | |
What a concept. No more pumping. I love it. I've slightly modified mine a bit by adding a 12" plastic tube on the clean side of the cartridge, eliminating the clean water bag to save weight. Add the supplied plastic stopcock & I'm good to go. Back flushing can be aided with a small funnel. Platypus/Cascade Designs recommends back flushing after each use which I feel is overkill especially if you're only filtering high mountain stream water. | |
| Jeff Gerhard at Backcountry.com on 10/27/2008 | |
Good product | |
| Rating: | |
| Good flow rate, water tasted just as good as my katydin hiker pro. Only negative is that you need a good flowing source of water to get the bag completely full. It is somewhat hard to get a full bag in shallow slow moving water. | |
| jimboutit at REI on 10/24/2008 | |
Great.... when it works | |
| Rating: |  |
| I took this on a 6-day trip to Sequoia/King's Canyon last year. For the first 3 days this was my favorite piece of gear ever. The speed and convenience of filtering water for three people compared to pumping was just night and day. All of this changed the morning of the fourth day, when we discovered that the filter had dropped dead in the night. It was cold, but not below freezing, and we had taken the precaution of wrapping it and snuggling with it to make sure it didn't freeze. Water essentially stopped flowing at all, and field tests indicated that the fibers had ruptured. We still have no idea what could have happened to it. So we ended up boiling and chlorinating water for the last three days. I've heard similar stories about other hollow-fiber filters. Bottom line, I no longer trust this filter. | |
| Timer at REI on 03/04/2009 | |
Disappointed | |
| Rating: | |
| I love the concept of letting gravity do the pumping, but stopped working for me after about 20L of water. Water was silty from a glacial river, but I did backflush. I did the backflush of 1L after each dirty bladder full, as recommended, and got a backflush of silty water out. Despite doing the backflushing, my filter flow rate was down to a very slow less than 1L in 5 minutes. I even backflushed with a tap water faucet when I got home and got alot of flow through on the back flush, but did not change my very slow filtering rate. Will be returning this product and go back to pumping. | |
| Bomik at REI on 06/28/2009 | |
Did not work for me... | |
| Rating: | |
| Went on my first backpack of the year yesterday. Took this filter, along with my old MSR as a back-up. The creek was running high and not crystal clear--but not THAT bad. This gizmo ran 3 liters through and just stopped. I did NOT backflush in the field--brought it home and tried to get it working again in the laundry sink, under ideal conditions. It is finally, after 20 minutes' work, functioning at a very low level--not nearly as fast as the first three liters. The concept is great, the execution flawed. It needs a pre-filter or better access for cleaning or SOMETHING. | |
| shelblue at REI on 05/09/2009 | |
Good idea ... Bad design | |
| Rating: | |
| Really like this concept, but ... the filter clogged up after a couple of uses, the handle pulled loose from the clean bag, and the bag closure is not a solo venture. This item really needs an easily servicble pre-filter/screen on the dirty side and a redisgn of the closure system and handle attachment. I'll be returning this item | |
| MacPappy at REI on 05/11/2009 | |
