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Rated 5 out of 5 by from 18 years and still works great! I bought this filter 18 years ago for a trip to the Boundary Waters. I like cold water and hate waiting for tablets to work, so this was the way to go. This filter has pumped 100's of gallons of water for me and my friends over the years from the Boundary Waters, PA, CO, ME and probably many other places I've inhabited since it was new! I'm so glad they still make filters for it. That's actually why I'm writing this review, I'm online tonight buying another cartridge for it. This pump will give you a work out, and if the water is silty/murky wrap a bandana or piece of cloth around the acorn. When you get home pull it apart dry everything out and you will have many years of great use!
Date published: 2013-10-13
Rated 1 out of 5 by from upgrade to the pro! I purchased this filter as a smaller unit than the "guide" water filter that I use with large groups. Within 6 months the nipple that the inlet hose attached to broke. The only saving grace is that we were able to submerge the bottom of the filter to replenish our water. REI gladly replaced it but before I had a chance to use it my friend who had the same filter experienced the same failure. I returned mine and upgraded to the pro version. The pro version has a quick disconnect for the inlet hose so it doesn't suffer from the stresses of removing and installing the hose. Going on 5 years of regular use and would recommend the upgraded version to anyone!
Date published: 2017-02-05
Rated 1 out of 5 by from Don't Rely On This Filter Although I used this thing gently and only filtered about 4 gallons of water through it total, the lower nipple broke off when I removed the silicon inlet tube. I'd read other reviews where folks complained of a weakness in the design of this area, but assumed they were careless in their use of the filter. All I can say is that I was especially careful with mine and still it broke off. Now the filter is useless. If I had it to do over again, I would not buy this filter. Of course, I recommend that you do not buy this, as it will leave you in a pickle some day when you need water. If you buy it anyway, please carry iodine tablets (as you should with ANY filter), or have some other backup water source—you'll need it.
Date published: 2010-04-16
Rated 2 out of 5 by from Broken on first use Initially, I was very impressed with the simplicity of this filter (and price). As I went to break everything down and put it back in the pack, I noticed a plastic nipple in the end of the hose I had just disconnected - it was the nipple for the inlet and it had broken off the filter upon removing the hose, rendering the filter useless. Fortunately, this was a "trial run" a week before a long hike, but if I had been in the backcountry, this would have been a major problem. I expect that REI will exchange it and I will definitely use extreme caution from here on, but I'll also always carry a backup method of purification.
Date published: 2010-01-10
Rated 3 out of 5 by from Nipple broke While using this product on our second backpacking trip, the inlet nipple on the filter snapped off rather easily while removing the inlet hose. This was only the 9th time the product had been used. Considering its use as an outdoor product, I have to say the product design was not rugged enough. Although the nipples are recessed into the filter, that did not prevent the design flaw that caused it to snap off at the base. I did not use any lateral pressure when removing the hose. This flaw left me in the backcountry with a broken water filter. Fortunately, I was still able to use the filter without the inlet hose by submerging the inlet end of the filter in the water source.
Date published: 2010-04-01
Rated 1 out of 5 by from Breaks easily This pump works reasonably well while it lasts. However, this last summer I have seen 4 of them fail on 3 separate trips in the exact same way - the plastic casing of the pump splits apart at the seam and the pump can no longer maintain adequate pressure. In one backcountry trip we brought 2 of these to be safe and they BOTH failed. So in summary this is a very lightweight pump that works reasonably well. Just don't take it anywhere where your life depends on it.
Date published: 2012-12-16
Rated 4 out of 5 by from Proved itself worthy in the feild I use this product on multi-day backpacking trips on the Appalacian trail, for myself and my two sons.On these same trips a freind had the MSR brand filter.For the amount of exertion needed, the Katadin hiker produced more water and was physically easier to use than the MSR. My freind borrowed the Katin hiker and the next week he bought the Katadin hiker.I also found the Katadin easy to disassemble and clean. The reason my freind bought the MSR is that he was told the replacement O-rings can be found at any hardware store,where as the Katadins parts arent standard size. Although Im not sure that this is true or not.
Date published: 2007-09-17
Rated 2 out of 5 by from Inlet nipple breaks off I used a friend's filter at the start of a backpacking trip and when I tried to remove the inlet hose to store it, the plastic nipple broke off, making it unusable for the rest of the trip. She said she had owned it only 2 months. I read some of the 60 (so far) reviews, and found 4 other reviews where the input nipple broke off. I downloaded the manual, and found that Katadyn says to remove the output hose after use, but doesn't mention removing the input hose. If you own this filter, I recommend that you never try to remove the input hose, and carry some type of backup.
Date published: 2009-09-28
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Questions & Answers

My water was brown and there were a couple of decent sized specks of dirt at the bottom of my bottle after pumping from a river that's brown due to silt and sand. Is this normal?

Asked by: LC_Rider
one thing that helps in dirty water is to wrap a paper coffee filter around the inlet to filter out the really large chunks
Answered by: Deek
Date published: 2017-12-11

What are the differences between the Katadyn Hiker Water Filter and the Katadyn Hiker Pro Water Filter?

Asked by: duck
They use the same filter system. The Hiker Pro has 30% more capacity, which makes it faster. It also has quick-release fittings, which means the output hose can attach directly to most hydration reservoirs. You will find it here:
Answered by: REIservice
Date published: 2017-12-25

What am I doing wrong with this pump.  The first 30 liters are GREAT and then the pumping gets harder and harder.  I have tried three of them and it is the same every time.  The water is crystal clear that I have been pumping.

Asked by: sunchipper
Cartridge capacity depends on water quality. The Katadyn Hiker was tested at 750 liters and found effective for removal of bacteria (Klebsiella terrigena) and protozoan cysts (Giardia and Cryptosporidium). For maximum performance, cartridge should be replaced after 750 liters or when the unit becomes hard to pump. Be sure to follow the instructions in the manual for cleaning after each trip. The manual can be downloaded off the Katadyn website.
Answered by: REIservice
Date published: 2017-12-25

Where can you buy replacement hoses for the Hiker Pro?

Asked by: Kevin317
Please consult the manufacturer's website for more information regarding replacement parts.
Answered by: REIservice
Date published: 2017-07-18

I have a Base Camp Water Microfilter (Back Country Series) that has never worked. I bought it from you several years ago, took it to the Quetico and it leaks around the threaded cap when tightened but not while loose. Help???

Asked by: Mac from Michigan
Please contact us at 1-800-426-4840 or contact the manufacturer directly for assistance with your water filter.
Answered by: REIservice
Date published: 2017-06-15

What is the replacement filter for this item (as opposed to the Pro model)?

Asked by: Jen84004
The Hiker Pro Element is the replacement filter for the regular Katadyn Hiker as well:
Answered by: REIservice
Date published: 2017-07-12

Will the filtered water still look yellow.  We pumped some through our kitchen water sink and the water came out yellow. (our water is not yellow)  Thought maybe the filter caused this color???? Is it working? 

Asked by: Beth
If you are pumping clear tap water through this filter, the water coming out should be clear. If you have the older PUR filter with iodine in the element that could cause the water to be yellow. If the filter was stored for a long period of time after being used in cloudy water this could also cause the water to be yellow. We recommend replacing the filter element.
Answered by: REIservice
Date published: 2017-12-11

Are the filters for this unit interchangeable with the similar looking old Pur filters??

Asked by: mtnbear
Replacement filters for this unit can be found here.
Answered by: REIservice
Date published: 2017-10-04
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