Oct 3, 2011 at 7:15 am #1280092
How have you successfully prevented your water filter from freezing?
Putting it a pants pocket seems like it would work down to 10-20F, but at a certain point, there's not enough body heat and contact to keep it from freezing.Oct 3, 2011 at 7:34 am #1786062
Steve GaioniBPL Member
Keep it in your sock drawer at home…
I really suggest not using a filter and instead going with chemicals (allowing for extra treatment time in cold conditions) or a Steripen. Filters, their hoses and everything about them are an even bigger headache in cold conditions (IMO).Oct 3, 2011 at 7:58 am #1786064
Thanks. :) That's what I've done so far. I've always had "safe" water available or just drank it raw on my winter trips.Oct 3, 2011 at 8:06 am #1786067
@mad777Locale: South Florida
I whole heartedly agre with the sock drawer solution. Well put!
I'm a filter user but always carry chemicals for backup. In sub-freezing weather I boil water usng a wood stove (no fuel weight penalty). It takes time but I never complain about warm tea or a cup of soup in winter.
Store extra warm water in an insulated container. A friend started using stainless steel bottles in winter because they can be heated directly in the fire. That's got me thinking….Oct 3, 2011 at 9:53 am #1786100
Rick DreherBPL Member
@halfturboLocale: Northernish California
The MSR Hyperflow cartridge or the Sawyer cartridge go into a Ziplock in my sleeping bag on sub-freezing nights, but I've never used them in weather that was below freezing 24/7 so haven't faced that. I suppose I'd keep it in an inside-facing jacket pocket, presuming it doesn't interfere with pack straps.
The MSR is more slender than the Sawyer, so would be less noticable.
RickOct 3, 2011 at 11:03 pm #1786373
Eric BlumensaadtBPL Member
@danepackerLocale: Mojave Desert
My PUR and First Need filters have been replaced with a SteriPen Adventurer and Katadyn chlorine dioxide tablets for the past 3 years. I think for winter this combo would be a far better answer than filters that are prone to clogging (if not cracking) through freezing. Not to mention the weight savings.
I melt snow in winter to get my water so purification is a by-product of the melting & boiling. A CC Sidewinder/Inferno wood stove is my solution for fast snow melting. If I expect high winds I use my MSR Dragonfly multi-fuel stove and white gas.Oct 3, 2011 at 11:50 pm #1786379
@b-g-2-2Locale: Silicon Valley
I was on a high-altitude trek, and the outfitter had supplied one of those big Katadyn expedition filters with a ceramic element inside. I think they cost over $1000. We were camped well above 18,000 feet, and somebody forgot to purge the water from the filter overnight (it was cold). In the morning, they had about a hundred small pieces of ceramic. So, there was no more water filtering for the rest of the trek. That made me kind of nervous in a tropical third-world country.
–B.G.–Oct 4, 2011 at 12:05 am #1786385
@rcaffinLocale: Wollemi & Kosciusko NPs, Europe
Sock drawer. We rarely carry a filter in the snow. What for?
CheersOct 4, 2011 at 3:58 am #1786401
Mark FowlerBPL Member
It can be useful if you are yellow – white colour blind.Oct 4, 2011 at 7:26 am #1786439
Thanks everyone for your insightful and funny responses. I wanted to make sure there wasn't some technique I was missing.
For my approach in Appalachian mountain wilderness areas, boiling water or melting snow would generally work well because I have a campfire in the evenings. I don't like chemicals because of the taste, and they require a 4 hr treatment time for protozoa at low temperatures, which I estimate is the most likely pathogen. If I can wait 4 hrs for water, I'm in camp and could easily just boil some water.
I'll probably just stick to what has worked for me in the past in the winter: drinking straight from carefully selected sources. I do like to filter when possible just to be safe, since it's only a 4 oz weight penalty. But, I'll save that precaution for the 3 seasons.Oct 4, 2011 at 7:36 pm #1786822
USA Duane HallBPL Member
@hikerduaneLocale: Extreme northern Sierra Nevada
Assuming winter camping means there is snow on the ground in sufficient depth.
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