The water filtration systems industry has developed massively in the last few years and there are now a bewildering array of considerations to make and styles to choose from. So we’ve done the work to make sense of it all for you.
As a backpacker or bicycle tourist you can find yourself purifying everything from your Tanzanian hotel bathroom water to a muddy Indian Canal.
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How we compile our gear guides: during the almost 10 years of cycloscope.net our team personally tested dozens of similar pieces of gear. For what we can't test personally, we involve other people in the cycling community to give their feedback and opinion about gear they have used. Our decade-long experience in bicycle touring enables us to find the key cons and pros of every product we mention.
Water Filters VS Water Purifiers
The filter itself does most of the work and gets most, but unfortunately not all, microscopic life out of your water.
The basic fact is that there are big micro bugs like Amoeba and Bacteria that are relatively easy to filter out but viruses are just so small that it’s a technological challenge to filter them out, not even the best camping water filter will catch them.
The good news is that 99% of the bad stuff in water are amoeba and bacteria so usually that’s enough.
If you do want to stop viruses then you need a purifier. Purifiers come in many forms, chemical, UV light and super-fine filters being the most common all of which have their pros and cons.
All the microscopic stuff you’re cleaning out of your water is slowly blocking the microscopic pores in your filter, and that means filtration gets slower and harder. Some filters try to send it back out the way it came with a back-flush. These can be either built in or come as a syringe, and extra item to carry.
3 Great Portable Pump Water Filters
Our first water filter was a pump. You pump water through a filter and get as much water as you want when you want it. They’re usually a bit bulkier and a bit more effort, but give you maximum control. Pumps also, well, suck.
We don’t mean all that hard work pumping, or actually maybe we do, but they also suck up the water from anywhere, direct from the stream, that bucket or your spare coke bottle. This frees you from the need to have just the right bag.
1. MSR Guardian Purifier Water Filter
Filters 1 litre in about 40 seconds
Weighs about 0.5 kg
The MSR Guardian is the ultimate Pump but it doesn’t come cheap. It’s sturdy, self cleaning and most importantly it purifies. If you want to weep at the cash register once then reliably have clean water for month after month, year after year, no matter what, this is worth considering.
So you want a pump but you don’t want to pay $350 for the Guardian. The miniworks does the basic job of cleaning water under most circumstances but it’s not going to purify.
Instead to earn its `”purifier” label it comes with chlorine tables which of course mean your’re going to need to keep buying them. It’s perfect when you mostly don’t need to purify then adopt a two part solution of tablet or UV for the rare circumstances you do.
Squeeze is the new pump, basically instead of pumping you fill an input bag and squeeze the bag and out comes clean water, simple. The down side is high pressure in plastic bags is a disaster waiting to happen.
4. Sawyer Squeeze
Filters 1 lt in about 40 seconds
Weighs about 0.6 kg including back-flush syringe.
The Sawyer squeeze is the classic squeeze device. It does what it does well, and reliably on long trips but it doesn’t purify but its rated down to 0.1 micron which good for a non-purifying device.
The device itself has a reputation as being solid and reliable, the biggest problem is the input plastic bags, the things you physically squeeze and they’re what’s likely to break then your device will be rendered useless.
At least they’re light, bring spares. It comes with a special syringe to back-flush the device, and on longer tours your should carry it.
Gravity filters take away all the hard pumping and squeezing and instead with gravity filters water flows from a top bag through the filter into a bottom bag.
They’re great for setting up at your campsite and just leaving them do their own thing but because they take more time they’re less good for that quick stop by a stream to refill your water bottles.
5. Sawyer 1 Gallon Gravity System
Filters 1 litre in about 2 minutes
Weighs about 0.12 kg
If you want a gravity system that will fill your bottles at your campsite that can double as a squeeze system for a quick “give me my water now” refill on the road then this is your ideal product.
Sawyer finally realised that other companies were providing adaptors to turn this squeeze filters into gravity filters and so they produced their own. You get 1 Gallon (3.78 L) water bladder to hang from a tree or your handlebars, with the hose at the bottom that connects to a variation of the standard Sawyer Squeeze Mini with an output hose to whatever you’re trying to fill.
Like any gravity system you’re dependent on a gravity-style bladder with an exit hose at the bottom and they can break the road, you probably should bring spares but they’re light.
They claim to filter to 0.1 micron which is on the line for viruses but they don’t promise virus removal. You might want to carry tables or a UV pen if you’re expecting some seriously bad water.
The Platypus GravitWorks lacks the flexibility of the Sawyer system but if all you want is a gravity system, then it’s a better gravity system than a Squeeze that also does gravity – it’s faster and more durable. Even if you buy the Sawyer system, buy the Platypus bags.
UV light kills bacteria and viruses. Eventually. So the idea behind portable water purifiers is to stick a UV light in your water and wait about an hour and everything should be dead.
Pros is they purify without chemicals, Cons is the time, no guarantee of making it to the deepest darkest corners of your water bladder and it adds another device to your already crowded device charging list.
7. SteriPEN Adventurer Opti
Filters 1 lt in about 90 seconds
Weighs about 0.2 kg
A UV product like SteriPen should kill all bugs in your water but it’s not going to clean dirty water. It’s great for bottles and smaller bladders but it may not purify everything in the biggest water bladders and it takes time.
A full charge (4-6 hours) should last for about 30 – 50 L of water. One bulb is supposed to last about 8000 L. So if you need to purify and don’t want to put chemicals in your drinking water and you think you’ll have reliable electricity then it’s a good option.
For those really bikepacking and camping in the remotest locations, it could also be part of a strategy where you filter with something else most of the time and you want an occasional full purification option for the worst water.
Bottles are popular with cyclists but not necessarily the first choice for touring. But if you really want a bottle or want something multi use for travelling, hiking and cycling then there are some interesting options.
They’re quick, you drink straight from the bottle using the energy of sucking or squeezing. But they’re only for drinking and are one per person.
The Grayl Geopress has some serious pros and cons. First it purifies. In fact it has the highest quality purification of any item on the list, and also successfully removes heavy metals from truly bad water.
That makes it an option if you really care about your water quality, particular ly when you trust your night water source but just want to purify road water or when you want a two device filter and purify strategy.
The cons are it’s a bit on the heavy side and the cartridges are rated to about 350 uses of the 750 ml bottle or maybe 200 litres, and they cost about $30 each. Long term that adds up plus Grayl is a new startup so there’s no guarantee on future cartridge replacements.
Still one of our favourite portable water purification and filtration systems, all in one!
Frequently Asked Questions about Camping Water Filters and Purifiers
Do water filters purify water?
No. Water filters remove micro bugs like Amoebas and Bacteria. To get water safe from viruses you need a water purifier (UV or chemical). Boiling water for some minutes also kills most viruses.
Do UV water purifiers really work?
UV purification is a safe way to purify water without the use of chemical. For UV light to kill 99.9% of the pathogens though, it takes a certain amount of time, related to the size of the filter and the amount of water. So always give your portable UV purifier enough time.
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