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MSR Guardian Purifier Water Pump

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SKU 927-02370

Nothing is safer or easier to use for purifying the most demanding backcountry water sources than the Guardian purifier. Originally designed for military squads, it brings this highly advanced technology to global travelers, backcountry users, and those stocking emergency kits. Fast and easy to use, this pump purifier offers the added viral protection you need when traveling in developing nations and popular wilderness areas. Its advanced hollow fiber filter offers the most reliable way to purify even filthy water conditions. Add its long-lasting performance and revolutionary self-cleaning ease, and this may be the only treatment device you’ll ever need.
  • Meets NSF protocol P248, testing standard used by U.S. military, for removal of viruses, bacteria, protozoa, chemicals and toxins, and sediment from “worst-case” water conditions
  • Pumps a rapid 2.5 liters per minute, offering added viral protection without the need for chemicals, bulbs, batteries, or waiting
  • Pump self-cleans on every stroke, providing consistently fast flow rates with zero hassle—no back flushing or filter-scrubbing ever required
  • Leading-edge hollow fiber cartridge treats up to 10,000+ liters and has a cartridge replacement indicator
  • Engineered to withstand heavy use, freezing, drops (6 ft), and harsh environments
  • Weighs 1 lb 1.3 oz / 490 g
  • Water bottle adapter

Q: What is your return policy?

A: Returns or exchanges can be made up to 30 days after the purchase date. We will take the item back as long as it is new, with all the tags and original packaging (if applicable). Click here to see all the details.

Q: When will my order ship?

A: Most items ship on the same day if placed by 3:30 pm MT Monday-Friday.Click here for more shipping info.

Q: How quickly will I receive my order?

A: We always strive to deliver as fast as we can. With that said, it depends on your location, the item(s) purchased, and the selected shipping method. If you choose our Free Standard Shipping you can expect a window of 3-8 business days. If you choose a paid expedited shipping method, refer to our shipping page for a better estimate.

Q: How do I get AvidMax Reward points for items I purchase?

A: All you have to do is sign up for an account and for each purchase you make you will receive 5% back in AvidMax Reward points. Easy! Create an account today!

If you have a question that we did not answer here, please shoot us an email or chat.

We are a fully authorized MSR dealer. All MSR items we sell are brand new, and are covered by their parent company warranty as follows:

Most damaged Cascade Designs products can be repaired
In order to keep our products in use and out of the landfills, Cascade Designs offers a repair service. If you cannot repair your product, please return it to the Cascade Designs Service Center. If possible we will repair non-warranty damage at a fair rate. For North American customers, please contact our Customer Service Center below for details on current repair fees. For customers outside North America, please consult our International Distributor listings.

E-mail: Cascade Designs Service Center
Tel: 1-800-531-9531
Fax: 1-800-583-7583
4225 Second Avenue South
Seattle, WA 98134 U.S.A.
Hours of operation:
Monday–Friday, 8 a.m.–4:00 p.m. Pacific Standard Time.

*We ask that you clean products before sending them to us.

What is not covered
Normal wear, abrasion, misuse, alteration, abuse, taking apart of the product, or improper washing and drying are not covered. This warranty does not cover damage caused by improper care, accidents, prolonged UV exposure, or the natural breakdown of certain materials over long periods of time. Cascade Designs will not be liable for incidental or consequential damages. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply. Shipping charges to Cascade Designs for a defective product are not covered.
How to obtain warranty service or repair service for field-damaged products Please click here to log into our website and create a Return Authorization number. If you do not have a login, then click the "Need to sign up for a new account? Please click here" link at the top of the login page. If you live outside the United States, please contact our Customer Service Center at 800-531-9531.
Send in the item(s) to Cascade Designs Inc with the RA#, your name, and return address marked on the outside of the package. We recommend using a carrier who can provide tracking for your package.
Please make sure all mattresses and tents are clean before sending them in. Please do not send checks or cash; you will be contacted via email if there is a charge for your repair.
Please allow 4-6 weeks for your item(s) to be returned to you.


MSR authorized dealer warranty info.