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iron Member
Joined: 10 Aug 2008 Posts: 6392 | TRs | Pics Location: southeast kootenays |
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iron
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Tue Jul 31, 2018 9:56 pm
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HitTheTrail Member
Joined: 30 Oct 2007 Posts: 5458 | TRs | Pics Location: 509 |
Looks interesting and could be of some value when traveling to countries that have questionable water sources, or for removing viruses, heavy metals, chlorine taste, or green swamp water. But most people here source crystal clear melt water. Half a pound extra weight could be a deal breaker for a gram winnie. That being said, I do keep a 0.01 micron filter in my house emergency kit.
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Seventy2002 Member
Joined: 19 Jul 2008 Posts: 512 | TRs | Pics
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For a nickel more you can buy a Katadyn Hiker Pro. For $20 less, you can buy another brand making the same claims.
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DIYSteve seeking hygge
Joined: 06 Mar 2007 Posts: 12655 | TRs | Pics Location: here now |
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DIYSteve
seeking hygge
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Thu Aug 02, 2018 7:35 am
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iron wrote: | i'm not a gravity filter person, or at least not |
Why not?
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HitTheTrail Member
Joined: 30 Oct 2007 Posts: 5458 | TRs | Pics Location: 509 |
Seventy2002 wrote: | For a nickel more you can buy a Katadyn Hiker Pro. |
The Katadyn Hiker Pro filters down to 0.2 microns. The survivor Filter Iron is referring to claims to filter to 0.01 microns. I am sure an engineer like Iron would immediately recognize the significance of an order of magnitude smaller pore size.
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JonnyQuest Member
Joined: 10 Dec 2013 Posts: 593 | TRs | Pics
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Might come down to whether or not the additional protection of 0.1 micron is worth the additional weight penalty. As noted above, "normal" PNW backpacking and hiking water sources are fairly clean, and you're only worried about microorganisms (giardia, etc.) and maybe some bacteria. For those, the more standard 0.2 micron filters offer adequate protection.
My heavier 4-season tent offers better protection. But do I need that additional protection?
And I'm with Steve re gravity filters. Unless you're talking an ultralight cap style filter, why work extra when gravity is always there to help?
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Malachai Constant Member
Joined: 13 Jan 2002 Posts: 16092 | TRs | Pics Location: Back Again Like A Bad Penny |
Sawyer is coming out in August with a micro filter for about the price of the mini which is supposed to have a higher flow rate than the mini. You probably do not need a virus filter in the US, i did get shots for Hep A and B for overseas.
"You do not laugh when you look at the mountains, or when you look at the sea." Lafcadio Hearn
"You do not laugh when you look at the mountains, or when you look at the sea." Lafcadio Hearn
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DigitalJanitor Dirt hippie
Joined: 20 May 2012 Posts: 792 | TRs | Pics
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FWIW I think there's pros and cons to various water treatment systems, and what's 'ideal' probably depends on the circumstances.
Example: I never put much stock into grav systems until I met (OK, hauled beer out to, lol) some friends bikepacking through the Quilomene a few years ago. There were 5+ guys slabbed out next to the Columbia that in addition to whatever they were using for the night needed to fill up 100oz camelbaks for the next day as they'd be biking for hours in hot dry weather before hitting the next water supply. Having a grav filter system with a good sized upper and lower bag that could sit there and burble away for everyone was absolutely the right choice.
I like using the Steripen if I'm out by myself and the water I'm likely to run into along the way doesn't have a lot of crud in it. Or if the weather is going to be really cold and I don't want to risk freezing a filter.
I like using the Grayl for the three of us just hiking along for the day with a cooked mid day meal.
I received as a gift a bike bottle with a straw filter I can suck water through... which is fine for rides where I know I'm going to be along water fairly frequently, but is absolutely no good for filling another container (camelbak or cooking) so it's utility is limited.
ETA: AND... just last Sunday I did a big bike turn in the Taneum where the only water along the entire route was a very puny trickle. I couldn't get enough water into a bottle to treat, fortunately the 100oz camelbak was enough. But that would have been a good case for a pump style filter to suck water out of a small pool.
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HitTheTrail Member
Joined: 30 Oct 2007 Posts: 5458 | TRs | Pics Location: 509 |
JonnyQuest wrote: | For those, the more standard 0.02 micron filters offer adequate protection. |
Just to clarify, most standard hiking filters are 0.1 microns not 0.01 (or 0.02 as stated above).
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JonnyQuest Member
Joined: 10 Dec 2013 Posts: 593 | TRs | Pics
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HitTheTrail wrote: | JonnyQuest wrote: | For those, the more standard 0.02 micron filters offer adequate protection. |
Just to clarify, most standard hiking filters are 0.1 microns not 0.01 (or 0.02 as stated above). |
Oops, my bad on the decimal point. Meant 0.2 microns, which is (or has been) the standard on most hiking filters (Katadyn silica matrix pump and gravity, MSR hollow fiber, ceramic, and silica depth, and Platy hollow fiber. Yes, some of the new hollow fiber "bottle top" (Katadyn BeFree and Sawyer) are 0.1.
Wow, 0.01. Wonder how that flow rate holds up?!
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InFlight coated in DEET
Joined: 20 May 2015 Posts: 847 | TRs | Pics Location: Seattle area |
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InFlight
coated in DEET
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Sat Sep 01, 2018 8:47 am
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I own the MSR pump, Steripen, Saywer, Grayl, and have tried most every chemical system.
I generally prefer the Saywer filter as my goto for most trips. Very light weight way to insure clean water.
I always carry a some chlorine dioxide tabs as a backup.
For areas where I know their will be glacier runoff, I would definitely go with the field cleanable MSR pump. The very fine particles will clog any micron filter.
I use the Grayl in my day hiking pack. For small seeps, a zip lock bag is easy to fill with water and transfer to the Grayl or Saywer squeeze bag.
“I went to the woods because I wished to live deliberately...” ― Henry David Thoreau
“I went to the woods because I wished to live deliberately...” ― Henry David Thoreau
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Songs2 Member
Joined: 21 Mar 2016 Posts: 200 | TRs | Pics
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Songs2
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Thu Aug 15, 2019 2:41 pm
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I will be backpacking in Canadian Rockies in September.
The MSR Miniworks (field cleanable) filter looks like a decent choice for silty water with a lot of glacier flour.
I tried chlorine tabs only last time and it was pretty much a disaster.
I have a Kataydn Pro, never used.
I will check out the items mentioned by InFlight and will also welcome any advice or recommendations.
Gravity filter I saw being used, mostly by groups.
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SwitchbackFisher Boot buster
Joined: 24 Feb 2018 Posts: 364 | TRs | Pics Location: Wa |
Songs2 wrote: | I tried chlorine tabs only last time and it was pretty much a disaster. |
What was the issue with it, I ask because I have used iodine/chlorine tablets or boiling exclusively for years. Last fall I was gifted a steripen and have used it exclusively this year and have not died yet 😆.
The flower can be reduced a bit using a bandana type rag with a rubber band of nalgene before I fill.
I may not be the smartest, I may not be the strongest, but I don't want to be. I only want to be the best I can be.
I may not be the smartest, I may not be the strongest, but I don't want to be. I only want to be the best I can be.
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Songs2 Member
Joined: 21 Mar 2016 Posts: 200 | TRs | Pics
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Songs2
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Sun Aug 18, 2019 7:25 am
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Quote: | What was the issue with it, I ask because I have used iodine/chlorine tablets or boiling exclusively for years. |
I too have used iodine/chlorine tablets +/- boiling exclusively for years because of not wanting to carry extra gadgets.
The failure was in my not anticipating how bad the unfiltered turbid water would taste for drinking, and possibly also more iodine residue caught up in the suspended material.
AFAIK, the chemistry itself did not fail.
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InFlight coated in DEET
Joined: 20 May 2015 Posts: 847 | TRs | Pics Location: Seattle area |
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InFlight
coated in DEET
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Sun Aug 18, 2019 10:18 pm
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Since this thread has been revived.
I have switched to the BeFree filter for overnight use. I like the much higher flow rate over the Sawyer. The bag options are more limited with the bigger 42 mm size.
My son picked up the Newer MSR Trailshot, and I’ve tried it out multiple times. It’s a nice size, light, and you can add a coffee-filter/rubber-band pre-filter. It fine for quickly filling a water bottle, but a bit of a workout for filtering a bunch of water at once. I do like not messing with filling dirty water bags,
“I went to the woods because I wished to live deliberately...” ― Henry David Thoreau
“I went to the woods because I wished to live deliberately...” ― Henry David Thoreau
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