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      Katadyn gravity filters plugging     
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werintne
 
08/07/2020 03:26PM
Anyone have problems with the Katadyn gravity filters? Ours will filter maybe three gallons of water before slowing to a drip. We clean, pre-filter, let water sit, and we get water way off shore, but not having much luck.
 
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08/07/2020 04:02PM
Yes, if you're talking about the ones that have a paper media based cartridge which sits at the bottom of the dirty bags.... they've been thoroughly panned here. You can hack the cartridge and then insert a sawyer or platypus gravity filter in-line.

Both the sawyer & platypus gravity filters use hollow membrane filtration which is field maintainable in the form of clean-to-dirty back flushing. I normally try to back flush 1/4-1/2c water every time I disconnect the clean bag from the filter. Takes 5-10 minutes to do 4L of water depending on who changed the bag, if they got any residual air out of the filter, or if Bobby forgot to back flush after the last round.
 
werintne
 
08/07/2020 04:30PM
we never back flush no sure how to maybe Google it?
 
unshavenman
distinguished member(1284)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
08/07/2020 06:31PM
There are many many threads on this message board regarding failures of the Katadyn gravity filters. Steer clear and go with a Platypus GravityWorks or Sawyer. I personally love the Platypus.
 
TipsyPaddler
distinguished member (241)distinguished memberdistinguished memberdistinguished member
 
08/07/2020 07:03PM
unshavenman: "There are many many threads on this message board regarding failures of the Katadyn gravity filters. Steer clear and go with a Platypus GravityWorks or Sawyer. I personally love the Platypus."

+1

Only thing good about the Katadyn Base Camp filter is the easy to fill dirty water bag.

I use it for larger groups with a Platypus filter below the bag in a gravity filter set up. Easy to due with some great tutorials on this forum.
 
MidwestFirecraft
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08/07/2020 07:35PM
werintne: "Anyone have problems with the Katadyn gravity filters? Ours will filter maybe three gallons of water before slowing to a drip. We clean, pre-filter, let water sit, and we get water way off shore, but not having much luck."


Is it the new style with the removable prefilter?
 
bwcadan
distinguished member(1507)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
08/07/2020 10:04PM
Air in the lines can stop free flow of water even though everything is put together to allow gravity to do its thing and fill the appropriate bag/container. I make sure to allow water to run out as I hook up my filter system from top to bottom. Back flushing in the field helps in the event of a clog. Some times a blow back in the filter can flush out some of the obstruction as well.
 
08/07/2020 10:22PM
MidwestFirecraft: "werintne: "Anyone have problems with the Katadyn gravity filters? Ours will filter maybe three gallons of water before slowing to a drip. We clean, pre-filter, let water sit, and we get water way off shore, but not having much luck."



Is it the new style with the removable prefilter?"


No. This was an issue some had with the “Basecamp” filter which uses the same cartridge as the old Hiker. The newer BeFree bottle filters and gravity filters seem less prone to this issue and can be field serviced by shaking in clean(ish) water to dislodge sediment/particles. I never owned a basecamp but used one without issue and have had great experiences with the hiker, my bottle, and BeFree Katadyn products.
 
08/07/2020 11:31PM
I also had one of the first basecamps and mine plugged late on the first trip as well. I was dumbfounded when I realized the filter was shot and a replacement was only a couple dollars cheaper than a new complete system. I've been a Sawyer fan ever since and use my old basecamp as storage to refill the Sawyer when it's empty.
 
mjmkjun
distinguished member(2658)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
08/08/2020 03:44AM
Yes, they do clog up. Someone on this site shared a remedy/modification so they could continue to utilize the basecamp unfiltered-water bladder. Cut the filter down with a hack saw leaving just enough at the base to reinsert the bottom end of the filter. Pull off any remaining white filter paper that is glued to bottom piece. Reinsert in the bladder. Buy a Sawyer inline filter and you are good to go. Sawyer filters are much easier to backflush in the way they are designed with a housing.

I used a Katadyn gravity filter for a few years with no issues. Then when I decided to replace the old filter with a new one, is when it clogged on me the first usage. That was the second day of a 5-day trip. When I returned from my trip I discovered others were having same issue. I no longer use Katadyn filters. Once I modified the basecamp unfiltered water bag as described above, haven't had clogging issues since.

To backwash, use a large syringe and push water back thru the filter. Repeat several times.
 
heavylunch
distinguished member (133)distinguished memberdistinguished memberdistinguished member
 
08/08/2020 12:00PM
i had one. lasted 1 day and then clogged. Thing was junk. I got the Platypus gravity filter and like it. Been on many BWCA trips with it and have been happy.
 
Savage Voyageur
distinguished member(13340)distinguished memberdistinguished memberdistinguished memberdistinguished membermaster membermaster member
 
08/08/2020 03:29PM
Yah this has been discussed here many times before. It’s a common known problem. To fix the problem you save the katadyn water bag and plumb in a Sawyer mini filter. It will be the last filter you will buy. Good for 100,000 gallons.
 
08/08/2020 04:19PM
Savage Voyageur: "Yah this has been discussed here many times before. It’s a common known problem. To fix the problem you save the katadyn water bag and plumb in a Sawyer mini filter. It will be the last filter you will buy. Good for 100,000 gallons. "

Yup....hack saw off the bad filter, put a Sawyer in line, take a spare. Did this with mine years ago.
 
pswith5
distinguished member(3335)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
08/10/2020 08:42AM
Savage Voyageur: "Yah this has been discussed here many times before. It’s a common known problem. To fix the problem you save the katadyn water bag and plumb in a Sawyer mini filter. It will be the last filter you will buy. Good for 100,000 gallons. " I did this but used regular sawyer filter instead of mini. 20 bucks more but works well. I like the original katadyn bag. Easy to fill easy to hang.
 
MikeinMpls
distinguished member(674)distinguished memberdistinguished memberdistinguished memberdistinguished member
 
08/10/2020 11:08AM
This is great information. Our Katadyn worked great for several years, but has become a problem of late. Now I know the fix.

Mike
 
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