Water treatment.. UV or gravity filter? - ClubTread Community

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post #1 of (permalink) Old 03-20-2015, 04:04 PM Thread Starter
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Default Water treatment.. UV or gravity filter?

My UV Steripen is acting up, so I have a choice of doubling down and getting a new one (I really like the speed, convenience, and the fact it covers alot of bases, virus, bacteria, protozoa), or the other option I see used alot is this Platypus Gravity Works system:

http://www.mec.ca/product/5035-528/p...er%2Btreatment

Thoughts?

How would one know when to change the charcoal and polymer filters?

I don't like that it doesn't cover viruses, like a UV pen would..

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post #2 of (permalink) Old 03-20-2015, 05:01 PM
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Originally Posted by dougz View Post
My UV Steripen is acting up, so I have a choice of doubling down and getting a new one (I really like the speed, convenience, and the fact it covers alot of bases, virus, bacteria, protozoa), or the other option I see used alot is this Platypus Gravity Works system:

http://www.mec.ca/product/5035-528/p...er%2Btreatment

Thoughts?

How would one know when to change the charcoal and polymer filters?

I don't like that it doesn't cover viruses, like a UV pen would..
It depends where you're going. Several folks have told me that generally we don't have to worry viruses in the Canadian Rockies. The most frequent issues we'll encounter are Giardiasis and Cryptosporidium
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post #3 of (permalink) Old 03-20-2015, 05:04 PM
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I have both the Steripen and Gravity Works. I use the Platypus system 95%+ of the time. You can't beat its speed and ease!


The other 5% of the time is when I have some concern over virus. I do a little bit of research on each trip and see if there is any history of water problems. So far, this approach hasn't been a problem for me!


If you do go for Gravity Works, don't cheat on the backflush, you'll regret it in the long run...
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post #4 of (permalink) Old 03-20-2015, 05:11 PM Thread Starter
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It depends where you're going. Several folks have told me that generally we don't have to worry viruses in the Canadian Rockies.
Seems legit.. And yeah, not like I'm going to Africa or Asia..

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post #5 of (permalink) Old 03-20-2015, 08:00 PM
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Seems legit.. And yeah, not like I'm going to Africa or Asia..
This is correct. If you want it for international travel, research what you might encounter, and work accordingly.
But for the Canadian Rockies, viruses are completely a non-issue, so I simply don't take virus protection into account as a factor. I need it to kill or remove bacteria and protozoa, and as long as it does that, it meets my needs, and I can go on to compare other factors.
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post #6 of (permalink) Old 03-20-2015, 08:11 PM Thread Starter
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Looks like the weight and bulk between the 2 is comparable (factoring in the batteries and spares for the UV pen)..

But looks like less can go wrong with the Platypus set-up..

The Steripen was handy, but yeah, cracked the case on it, and now it's really finicky as to when it's going to turn on or not, end up doing the dance 4-5 times before I get lucky. Time for a change..

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post #7 of (permalink) Old 03-21-2015, 01:08 AM
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I have the Platypus 2L system and I think its one of the best out there. Easy to use, no pumping and you can carry 2L of clean water back to camp and an extra 2L of dirty water back to camp (which you can filter later). I think that the Platypus, paired with some Aquatabs (for on-the-go bottle fill-up from streams) is the ultimate system.

Not sure about changing the filters as I haven't had to do so. I guess you change them when the flow rate significantly decreases? FYI, I usually backflush the system every few times to clean the filter and increase flow rate, its very easy.
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post #8 of (permalink) Old 03-21-2015, 12:13 PM
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Some good points have been brought up regarding location and what needs to be done to treat water. The need to filter and treat water has a lot to do with where you are. Water from a high mountain stream in BC is a lot different than a muddy concoction in a third world country. In the latter I would be carrying bottled water. In the former I seldom worry about drinking straight out of the stream. Also be aware that you will be more likely to be immune to viruses in local water than elsewhere. You may just have built up antibodies to the local viruses through years of exposure. Not a guarantee of course!


link to good article about both sides of water treatment:


http://www.rei.com/learn/expert-advice/water-risks.html

if you're not hiking you should be skiing

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post #9 of (permalink) Old 03-21-2015, 12:38 PM Thread Starter
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Good article, thanks!
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post #10 of (permalink) Old 03-21-2015, 01:34 PM
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I have the 4 litre setup and have had it for awhile. I love it! Highly recommend it. Roll into camp, fill the bag and hang it. By the time I have the tent set up, I have 4 litres of clean water ready to use.
I've used everything from a MIOX purifier to pumps to Pristine and I honestly think this is the way to go.
Definitely back flush the filter everytime before packing it away.
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post #11 of (permalink) Old 03-21-2015, 03:23 PM Thread Starter
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Definitely back flush the filter everytime before packing it away.
Will do, thanks!
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