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Old 05-18-2011   #1
Carbondale, Colorado
Paddling Since: 2007
Join Date: Mar 2007
Posts: 262
Water Filtration - Platypus GravityWorks?

Hey y' the recent water jug thread got me thinking about my upcoming MFoS trip and water filtration.

We are trying to run as light as possible since that is advice I have received from various other people who have run it. With that in mind we are going to only carry a single water jug per boat - 20L/boat which will require various refills along the way.

I have an MSR Hyperflow but think that pumping that much water to refill jugs would be a PITA...

I see the Katadyn expedition filters but those are spendy!

Does anyone have experience using a Platypus GravityWorks filter? It seems to be more user friendly than using the MSR and way cheaper than an expedition Katadyn.


here is a link to the Platypus:

Platypus® GravityWorks™ Filter


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Old 05-18-2011   #2
Carbondale, Colorado
Join Date: Aug 2009
Posts: 317
I'm considering the same thing, so feeback would be greatly appreciated. I'm looking into buying the filter alone and using a 5 gallon bucket of sceened/flocculated water, siphon it through the hose/filter assemlby straight into the water jug. This way more than a few liters could be processed at a time and gravity does all the work.

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Old 05-18-2011   #3
Helena, Montana
Paddling Since: 96
Join Date: Apr 2010
Posts: 488
check out this thread.

i have the katydin and it works great. about 20 min for 3gal jugs, so its time consuming...plan accordingly.

some friends i know went in on one together as group gear, not so bad if you spread it out among 5 or so people.
Never get out of the boat
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Old 05-18-2011   #4
Dave Frank's Avatar
Boulder, Colorado
Paddling Since: 1995
Join Date: Oct 2003
Posts: 2,727
I bought the platypus for our self support Selway trip last year. Worked great, but you could probably have drank the water unfiltered, so it wasn't a challenging test.

It would come up short or at lest be slower than you'd want for a bigger group.

I don't picture it lasting long in silty conditions, but have no actual trials to speak of.

(seven two 0)-298-2242
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Old 05-18-2011   #5
Join Date: May 2005
Posts: 13
The Gravity Works is great. Easy to use and easy to clean filter (simply back wash through the filter). It cranks out a bunch of water quickly and effortlessly and with a little
planning you'll always have clean water at camp. Much better than pumping any day!
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Old 05-21-2011   #6
Denver, Colorado
Paddling Since: 1974
Join Date: Jan 2010
Posts: 140
REI has them on sale right now.
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Old 05-21-2011   #7
Join Date: Aug 2004
Posts: 123
I'm sold on the Katadyn. I've used it on 2 middle fork trips and several backpacking trips. As mentioned, it's slower than a manual pump, but much easier to load up and
let it filter as you sit relaxing. I would recommend carrying a spare filter in case the first gets clogged and starts running slow.

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Old 05-22-2011   #8
emelson's Avatar
McCall, Idaho
Paddling Since: 2009
Join Date: Jan 2011
Posts: 9
i've been pretty pleased with my gravity katadyn. got it for the same reasons; light and fast trips, and so far it's been excellent. good to have with you car camping away from facilities too...

don't use it on and silty SW rivers (without allum) or your filter will die a slow, sandy death.
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Old 05-23-2011   #9
Carbondale, Colorado
Paddling Since: 2007
Join Date: Mar 2007
Posts: 262
I made it by REI this weekend and they were sold out of Platypus GravityWorks filters. I ended up getting a Sawyer gravity water filter system.

Sawyer Complete Water Filter System - 2 Liter - Free Shipping for Members at

Seems to be just as good as the Platypus if not better since the filter is rated to 1,000,000 gallons...don't think I will ever need to replace it thus decreasing the overall cost of the thing?

I will let you know how it works out...
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Old 05-23-2011   #10
Carbondale, Colorado
Paddling Since: 2007
Join Date: Mar 2007
Posts: 262
oh and by the way, the Sawyer filter says MADE IN THE USA on the box. Thought I would mention that detail since us Buzzards are conscious of that sort of stuff...

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