Jun 7, 2011 at 9:36 pm #1275083
I've read up and down through all the Steripen threads, but I am stilling having some issues with using it. Briefly, I recently bought the pen to replace my Katadyn Hiker when I am in areas where water is fairly clear (Sierras) and I don't have to drink from cattle ponds (Henry Coe, etc.). The Hiker has been my reliable friend for a long time, especially since I'm not a chemical person. However, the recent REI sale got to me and I couldn't pass up the weight savings.
What I am struggling with is the prefiltering. I purchased a wide mouth 32 oz Naglene Canteen to use with the pen. I plan to decant to a platy if I need some additional liters for longer stretches (just using a cheap little funnel to decant). After looking at several coffee filter options, I gave up, cut a small square out of an old white t-shirt, and used a rubber band to fold it over the mouth of the canteen. It seems to work in my home tests, but I have yet to hit the trail with this setup.
Does anyone have any thoughts on what I am doing? Are there problems anyone sees with this method of prefiltering? Should I give up and go back to my tried and true Hiker?
Thanks.Jun 7, 2011 at 9:48 pm #1746319
Ken T.BPL Member
If you are using it where you plan to, where the water is clear, you just want to filter out the floaties. Many hear use a bandana. I have a piece of nanoseeum with some elastic to fit my bottle. Some here use a diesel fuel prefilter too. Just depends on your comfort level. No need to lug the filter.Jun 8, 2011 at 12:12 am #1746344
Mike WBPL Member
@skopeoLocale: British Columbia
…Jun 8, 2011 at 10:12 am #1746459
Thanks for the advice. It's just the difficulties of adopting a new setup and figuring things out.Jun 8, 2011 at 12:14 pm #1746499
Nico .BPL Member
@nickbLocale: Los Padres National Forest
+1 to the biodiesel 1-micron fuel filter. I've been using it with both my steripen (for solo trips) and gravity filter (for group trips) for the last few months. Seems to work well for most conditions at filtering out floaties, most dirt/suspended solids (but not quite all), etc.
If you're dealing with really clear water though, a bandana ought to do fine.Jun 8, 2011 at 3:02 pm #1746584
Stephen BarberBPL Member
Hiking primarily in the Sierras and other "clear" water areas, I too use a bandanna if any pre-filtering needs to be done. I have both a Steripen pre-filter and some bio-diesel bags, but have never felt the need to use them.
FWIW, I've found a 1 liter Nalgene "canteen" with the top cut off (ie, the heavy part) works great for using with the Steripen. I then pour the treated water into a light weight water bottle. The heavy duty plastic bag of a Nalgene canteen travels wrapped around the Steripen.
Just trying to keep things light!Jun 8, 2011 at 3:25 pm #1746600
Stephen B Elder JrSpectator
@selderLocale: Front range CO
Flows water much much faster than a coffee filter, and if you ARE concerned about critters in the say 50 – 100 micron range that might be resistant to uV or chemicals, it should more predictably remove them then a bandana, used sock etc.Jun 8, 2011 at 3:42 pm #1746606
I use the gsi coffee drip filter. http://www.campmor.com/outdoor/gear/Product___82197
It weighs more then I would like (1.4oz on my scale), but it is bullet proof and protects the threads of my widemouth nalgene canteen from contamination and keeps out the floaties,etc.. The steripen adventurer opti also conveniently fits inside it snugly for protection in the front of my pack for storage.
I have in the past used a bandanna, but I found in slow moving streams that it took forever to fill and I then had to wipe down the threads with my pack towel.Jun 8, 2011 at 3:49 pm #1746615
Randy MartinBPL Member
So for those that use the dudadiesel filter. What size do you use and how much do they weigh? Looking on their website it looks like the #3 size is the smallest they offer. Also when you use them is it a situation where the water flows through somewhat slowly?Jun 8, 2011 at 3:56 pm #1746617
@rcaffinLocale: Wollemi & Kosciusko NPs, Europe
If there are no large quantities of gunge in the water, why bother with a pre-filter at all? I don't carry one, and there have only been about 2 occasions in the last 20 years when I have bothered – then I used my handkerchief. Not worth the weight. I use my cooking pot for the sterilising.
CheersJun 8, 2011 at 9:17 pm #1746786
Mike MBPL Member
little confused w/ the linked thread- it's describing using a steripen first, THEN pre-filtering into a bottle to drink
the only reason I would consider using a pre-filter is to insure the steripen will work optimally
I had planned on cutting down a 2 liter platy to use as my "sterilizing receptacle" :) would this diesel filter be larger enough to use w/ the end of a cut platy? could I simply hold it in the cut opening and then scoop my water? to what extent does it impede water from going in?
I'd like to continue to use 1 (and occasionally 1/2) liter platy bottles to carry my water
MikeJun 9, 2011 at 12:32 am #1746827
Mike WBPL Member
@skopeoLocale: British Columbia
…Jun 9, 2011 at 3:47 am #1746847
I notice that the media is available as 72" width, 36" Length sheets. That would be a big supply of pre/post filter.
They have a lot of micron choices, are you all finding smaller better, or would say 5 micron be good while providing better flow?
(update: I'm a new hiker but I think I'm tempted to follow the bandanna when needed advice, just because I'm not seeing "I used a steripen and got sick" stories.)Jun 11, 2011 at 7:03 am #1747797
That was really an invitation for "I used a Steripen and got sick" stories, or "my friend did." Learning from failure and all that.Jun 11, 2011 at 7:17 am #1747803
Dale WambaughBPL Member
@dwambaughLocale: Pacific Northwest
The idea is that large particles can harbor and protect bugs from the UV. A bandana or microfiber towel will work for the big stuff. I made my own coffee filter holder from Seal-a-Meal material.
You can buy a commercially made one at http://bepreparedtosurvive.com/The%20Aqua-Pouch%20Plus%20Water%20Purification%20Kit.htmJun 11, 2011 at 7:44 am #1747815
Oh I get the idea Dale, but to really see the necessity (or at the detail, what micron level one should have for pre-filter), I think we'd need to see the boundary condition.
[metallic] Coffee filters have a much larger micron size than commercial pre-filters. Bandannas are larger than either. The "I rarely filter" reports are the most open-filter size ;-)
So … if I search the web and all four groups say "I did X and didn't get sick" … it's not really an endorsement of any particular practice.
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