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Details

  • SweetWater Purifier Solution is approved for use with the SweetWater Purifier System only, it is not recommended for use with other filter systems

Made in USA.

View all MSR Chemical Water Treatments

REI membership

Specs

Best Use Backpacking
Filter Type Drops
Active Ingredient(s) Sodium hypochlorite
Output 80 gallons
Rated 1 out of 5 by from Very Expensive The only active ingrediant in this product is 3.5% sodium hypochlorite. This is common household bleach. This product is a little expensive for household bleach. I generally love MSR products. I have used their SweetWater filter for years and am very happy with it, but to kill virus' I am now using household bleach.
Date published: 2008-10-22
Rated 5 out of 5 by from Hailing From The Land of Giardia Aside from the taste, (which is still totally tolerable) I don't see much wrong with this product. I've been using it for years and have never gotten sick. Unlike my friends who have not used it have gotten quite ill. Yea, you have to carry more than you need but, for me that's hardly an issue if it prevents me from getting sick in the woods.
Date published: 2008-05-11
Rated 4 out of 5 by from Does what it claims As others have noted this is basically a bleach solution. That said it is made for treating water and I feel I don't have to worry about having some thing 'extra' in it that might hurt me. It is expensive, but I believe it's worth it. MSR is probably making a killing on it, but oh well it works. As for taste, I don't believe it effects taste too much. It does add that chlorine smell which I don't like, but can live with it if it means I won't have a bathroom emergency. Happy Trails!
Date published: 2009-04-24
Rated 3 out of 5 by from Package is too large for backpacking The bottle is too large for backpacking: 1-3/8" diameter, 4-3/8" tall. It's too heavy (3 oz). Why would I want to carry enough chlorine to treat 80 gallons of water? Since I typically need to treat 3 liters, I don't want to carry all that extra weight and cubes. This should be repackaged in a more convient size. Either single serving (3 liter) ampules or add a chlorine proof 1/8 ounce refillable bottle to the 2oz package.
Date published: 2007-10-22
Rated 4 out of 5 by from Effective but Too Big and Expensive This product has been part of my water treatment ritual for years. I guess that it works because I have never been sick. Measuring the drops is easy and accurate. The taste is not a problem. The bottle is way too big and heavy for what I need as a solo backpacker. I pour most of it into another bottle and leave it at home.
Date published: 2010-03-10
Rated 5 out of 5 by from As the name states…SweetWater Bought this product for a high adventure trip to Hawaii to help with water purification in the back country. Only had to use it a couple of times since the other water I used was potable. The drops did not change the taste to my water supply and apparently did its job as I didn't get sick while on my vacation. Way to go MSR!
Date published: 2016-07-13
Rated 5 out of 5 by from versatile product! This is a great product for someone who does not want to carry a water treatment system. Works great and fast. No bad taste. A bit pricy, but totally worth it. Also great for traveling to other countries. Compact and discrete.
Date published: 2010-08-17
Rated 4 out of 5 by from Good Stuff After getting sick from filtering water downstream from a pasture, I bought some sweetwater. I haven't gotten sick since. Good insurance against waterborne viruses.
Date published: 2007-09-04
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I have an old style MSR Sweetwater Guardian microfilter kit that had the additional ViralGuard cartridge. Has that been replaced with this Purifier solution?  

Asked by: RandyB
Yes it has. While coming close, in testing, the older ViralGuard cartridges failed to meet the EPA standards and we pulled from the market.
Answered by: REIservice
Date published: 2015-09-20

How long after treatment can one drink the water?

Asked by: nunruh
After you are done pumping your water through the SweetWater Microfilter you will add 5 drops per liter and mix for 10 seconds. Wait 5 minutes before drinking the water after it has been mixed.
Answered by: REIservice
Date published: 2017-07-20
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Reviews

Rated 1 out of 5 by from Very Expensive The only active ingrediant in this product is 3.5% sodium hypochlorite. This is common household bleach. This product is a little expensive for household bleach. I generally love MSR products. I have used their SweetWater filter for years and am very happy with it, but to kill virus' I am now using household bleach.
Date published: 2008-10-22
Rated 5 out of 5 by from Hailing From The Land of Giardia Aside from the taste, (which is still totally tolerable) I don't see much wrong with this product. I've been using it for years and have never gotten sick. Unlike my friends who have not used it have gotten quite ill. Yea, you have to carry more than you need but, for me that's hardly an issue if it prevents me from getting sick in the woods.
Date published: 2008-05-11
Rated 4 out of 5 by from Does what it claims As others have noted this is basically a bleach solution. That said it is made for treating water and I feel I don't have to worry about having some thing 'extra' in it that might hurt me. It is expensive, but I believe it's worth it. MSR is probably making a killing on it, but oh well it works. As for taste, I don't believe it effects taste too much. It does add that chlorine smell which I don't like, but can live with it if it means I won't have a bathroom emergency. Happy Trails!
Date published: 2009-04-24
Rated 3 out of 5 by from Package is too large for backpacking The bottle is too large for backpacking: 1-3/8" diameter, 4-3/8" tall. It's too heavy (3 oz). Why would I want to carry enough chlorine to treat 80 gallons of water? Since I typically need to treat 3 liters, I don't want to carry all that extra weight and cubes. This should be repackaged in a more convient size. Either single serving (3 liter) ampules or add a chlorine proof 1/8 ounce refillable bottle to the 2oz package.
Date published: 2007-10-22
Rated 4 out of 5 by from Effective but Too Big and Expensive This product has been part of my water treatment ritual for years. I guess that it works because I have never been sick. Measuring the drops is easy and accurate. The taste is not a problem. The bottle is way too big and heavy for what I need as a solo backpacker. I pour most of it into another bottle and leave it at home.
Date published: 2010-03-10
Rated 5 out of 5 by from As the name states…SweetWater Bought this product for a high adventure trip to Hawaii to help with water purification in the back country. Only had to use it a couple of times since the other water I used was potable. The drops did not change the taste to my water supply and apparently did its job as I didn't get sick while on my vacation. Way to go MSR!
Date published: 2016-07-13
Rated 5 out of 5 by from versatile product! This is a great product for someone who does not want to carry a water treatment system. Works great and fast. No bad taste. A bit pricy, but totally worth it. Also great for traveling to other countries. Compact and discrete.
Date published: 2010-08-17
Rated 4 out of 5 by from Good Stuff After getting sick from filtering water downstream from a pasture, I bought some sweetwater. I haven't gotten sick since. Good insurance against waterborne viruses.
Date published: 2007-09-04
  • y_2017, m_7, d_25, h_8
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_8
  • loc_en_US, sid_671113, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_rei-inc
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 112ms
  • REVIEWS, PRODUCT

Questions & Answers

I have an old style MSR Sweetwater Guardian microfilter kit that had the additional ViralGuard cartridge. Has that been replaced with this Purifier solution?  

Asked by: RandyB
Yes it has. While coming close, in testing, the older ViralGuard cartridges failed to meet the EPA standards and we pulled from the market.
Answered by: REIservice
Date published: 2015-09-20

How long after treatment can one drink the water?

Asked by: nunruh
After you are done pumping your water through the SweetWater Microfilter you will add 5 drops per liter and mix for 10 seconds. Wait 5 minutes before drinking the water after it has been mixed.
Answered by: REIservice
Date published: 2017-07-20
  • y_2017, m_7, d_25, h_12CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_2
  • loc_en_US, sid_671113, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_rei-inc
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 108ms
  • QUESTIONS, PRODUCT