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Your cart is empty.The MSR Guardian Military-Grade Water Purifier Annual Maintenance Kit contains all the necessary components and instructions required to maintain the MSR Guardian Purifier’s performance and reliability; packed in a small, convenient carry case for field use. Kit includes: Instructions, Pressure Relief Valve Assembly, O-Rings, Cup Seal, Piston, Umbrella Valve, Silicone Lubricant and a Cleanside Cover. Manufacturer’s limited 3-year warranty. Made In USA.
patrick bedwell
September 1, 2025
My filter had been used for less than 10 days but on the third day of a 6 day trip it started making noises like a bear and a moose were mating (not to mention making me break a sweat from the increased resistance). I used the kit to change the o-rings and lube the various parts, and now it's smooth as butter. Easy to follow instructions, only one of the o-rings took a little effort to remove. From start to finish it took about 10 minutes.
Alive in FL
August 29, 2025
Always good to have spare parts on hand for everything.
CHARLIE
August 27, 2025
have not used yet-have spring that comes up in a spring house - nevers goes dry-
Scott Nuechterlein
August 12, 2025
Good to have this available in case your filter breaks down.
John R.
August 1, 2025
Fast shipping.....Just as described
Edward Hale
July 30, 2025
Product description listed “clean side cover†as being included, but my kit did not include this item. It turns out this was/is a typo. What IS included is a replacement for the rubber pad that sits in a pocket in the cover that seals up against the clean side nozzle when the cover is attached to the underside of the filter body. It is depicted in the product photo as a black cylindrical item just above the lubricant tube cap. The instructions for the kit lable this as the Cleanside Cover Seal.
Bryan Noll
July 15, 2025
I’ve skimped on annual maintenance for my MSR dragonflies over the years because they just keep on working. No harm no foul. I think it’s a little different when you’re relying on a device to give you safe drinking water and that comes down to the properly functioning seals and back check valve.This kit gives you all you need to replace your seals and make sure everything is well lubed up so it stays sealed as well as moves smoothly.The process is simple, but takes a little time to go through and do it right. A good idea is to sanitize the unit first. Unfortunately the tablets to do this aren’t included in the maintenance kit. Keep you hands clean so you don’t contaminate the purifier or make yourself sick if you filtered anything was harmful.Take care of your equipment, stay safe out there and enjoy the outdoors!
Wayne Slattery
July 14, 2025
What I liked about this kit is that the user manual is included (somehow I had lost my original manual). The manual shows how everything goes together and I was able to fix my filter, where one of the one-way valves had become dislodged after I did one or two strokes with a clogged intake valve.
Christian
July 2, 2025
Good
ΛLPΛSΞ
June 17, 2025
Conforme à mes attentes
Sven
June 2, 2025
Macht Sinn, das Set mit zu bestellen, wenn man den Wasserfilter bestellt. Passt jedenfalls noch in dessen Karton
Jacques DELUNSCH
May 27, 2025
Conforme à l annonce
David smith
May 16, 2025
not used it but it looks good
patrick bedwell
May 5, 2025
My filter had been used for less than 10 days but on the third day of a 6 day trip it started making noises like a bear and a moose were mating (not to mention making me break a sweat from the increased resistance). I used the kit to change the o-rings and lube the various parts, and now it's smooth as butter. Easy to follow instructions, only one of the o-rings took a little effort to remove. From start to finish it took about 10 minutes.
Alive in FL
March 30, 2025
Always good to have spare parts on hand for everything.
CHARLIE
March 9, 2025
have not used yet-have spring that comes up in a spring house - nevers goes dry-
Scott Nuechterlein
February 25, 2025
Good to have this available in case your filter breaks down.
John R.
February 23, 2025
Fast shipping.....Just as described
Edward Hale
February 21, 2025
Product description listed “clean side cover†as being included, but my kit did not include this item. It turns out this was/is a typo. What IS included is a replacement for the rubber pad that sits in a pocket in the cover that seals up against the clean side nozzle when the cover is attached to the underside of the filter body. It is depicted in the product photo as a black cylindrical item just above the lubricant tube cap. The instructions for the kit lable this as the Cleanside Cover Seal.
Bryan Noll
January 30, 2025
I’ve skimped on annual maintenance for my MSR dragonflies over the years because they just keep on working. No harm no foul. I think it’s a little different when you’re relying on a device to give you safe drinking water and that comes down to the properly functioning seals and back check valve.This kit gives you all you need to replace your seals and make sure everything is well lubed up so it stays sealed as well as moves smoothly.The process is simple, but takes a little time to go through and do it right. A good idea is to sanitize the unit first. Unfortunately the tablets to do this aren’t included in the maintenance kit. Keep you hands clean so you don’t contaminate the purifier or make yourself sick if you filtered anything was harmful.Take care of your equipment, stay safe out there and enjoy the outdoors!
Wayne Slattery
January 26, 2025
What I liked about this kit is that the user manual is included (somehow I had lost my original manual). The manual shows how everything goes together and I was able to fix my filter, where one of the one-way valves had become dislodged after I did one or two strokes with a clogged intake valve.
Christian
January 19, 2025
Good
ΛLPΛSΞ
January 2, 2025
Conforme à mes attentes
Sven
December 12, 2024
Macht Sinn, das Set mit zu bestellen, wenn man den Wasserfilter bestellt. Passt jedenfalls noch in dessen Karton
Jacques DELUNSCH
December 11, 2024
Conforme à l annonce
David smith
December 4, 2024
not used it but it looks good
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