In the world of outdoor exploration, access to clean water is non-negotiable. The MSR Autoflow Water Filter is a game-changer in this regard, offering backpackers and campers a reliable solution for obtaining safe drinking water in the backcountry. In this review, we’ll dive deep into the features, performance, and overall value of this essential piece of gear.

In the decades of being in the back country and adventure travelling, I have always used the MSR MiniWorks EX Microfilter. It wasn’t only until my previous work allowed me to field test a gravity water filter did I become a convert to these types of filters. Read on below and watch the video review to see why Rob and I have to come the MSR Autoflow Water Filter as our go-to!

Bottom Line Up Front

• Mechanical filtration can treat nearly all bacteria and 99.9% of protozoa and particulate
• Easy use and field maintenance
• Very robust and strong materials to prevent punctures and preserve product utility
• Cannot be used in sub-zero temperatures

Specifications

• Filter pore size: 0.2 microns (small enough to get rid of that pesky beaver fever, or giardia).
• Volume of water reservoir: 10 litres or 2.64 gallons
• Flow of filtration: 1.75 litres or 0.46 gallons per minute
• Field maintenance: Yes; simply back flush
• Cartridge life: 1500 Litres or 396 gallons, before replacement

Pros

• Very compact system, fit well in backpack and not bulky
• Made of strong material
• Doesn’t leave a taste in water as in other systems, can taste like plastic, or iodine
• Passive system, don’t have to continuously pump water
• Easy system to clean: After every 10L, back lush with 1L of water

Cons

None of these cons are actually really cons, and we really had to reach for them.

• Cannot be used in sub-zero temperatures; the filter may crack – however this is not unique to this filter and most filters will behave the same way
• Priming the system can be tricky; we found the easiest way is to either back flush, or have the line just run, before putting the end of the hose into the water bottle
• Over time, the mouth of the bag, where the connection points are, begin to degrade as the first thing to break down. But this is after 6 years of use and already impressed with the life span of the product

MSR Autoflow Water Filter

We love this product because it is easy to use and does a great job of filtering water. The MSR Autoflow water filter is designed to be used with gravity to filter large amounts of water quickly. We also appreciate the fact that it is designed to be used with gravity, which makes it much easier to use than other water filters on the market

It is ideal for use in situations where clean water is scarce, such as during natural disasters, and for those preppers, after a Sh*t Hits The Fan (SHTF) event. The MSR Autoflow Water Filter can filter up to 1.75 litres of water per minute, making it one of the fastest filters on the market. Additionally, it is made with durable materials that can withstand heavy use.

To note, again, do not use this filter in the winter as the residual water in the filter, when frozen, can expand and break the filtration mechanism inside.

How long does the filter last? Well, there’s no easy answer to that, but keep in mind the filter can last 1,500 litres. If you are 1 person, drinking and using 4 litres per day, this can last you 375 days. Yes, 10 days more than 1 year. Cleaning it should help extend the life span, but unsure for how long. From there, you may be able to calculate when to change the filter.

MSR Autoflow Water Filter Best Uses

Base camp: By far, this will be the best use at base camp, or home base, where you plan on having a few days. If you’re constantly on the move, that’s okay too! Anywhere you can hang this and let the gravity filter do it’s work.

While in the canoe, it may not be the easiest to use. But the idea is to have your water bottles filled before hitting the water. And if really need to refill, simply take a break, pull over, and filter some water. Otherwise, the hand pump MSR Miniworks will be a great back up.

Travelling will be helpful in hotel rooms should you not be able to find potable water. However, do note, that this will not filter out any chemicals and toxins, as it is only a mechanical filter. I have used the MSR Miniworks while travelling to varying degrees of success, largely due to the water filtration systems in the host country, and what remains in their water system coming out of the tap water. If you are sure your water is coming from, for example, fresh spring water, melting glacial water, or similar sources, then you may use this. To be safe, always know where your water is coming from!

This MSR Autoflow Water Filter can’t come any more highly rated. One quick outing with Rob, and he was a convert and has been using it for years since. It is perfect for those who are looking for an investment gear to adventure travel, as it requires no pumps or chemicals. The MSR Autoflow Water Filter offers a reliable and efficient solution for obtaining clean water in the outdoors. With its innovative design, high-performance filtration system, and user-friendly features, it’s a must-have for backpackers, campers, and outdoor enthusiasts alike. Whether embarking on a multi-day trek or enjoying a weekend camping trip, this versatile water filter ensures that safe hydration is always within reach. With the MSR Autoflow Water Filter by your side, you can explore with confidence, knowing that clean water is never far away.

Check out further details of the MSR Autoflow Water Filter in the video, below!

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