Membrane Solutions Gravity Water Filter Pro: 0.1-Micron 4-Stage Personal Filter Straw with 6L Gravity Bag
Product description
What it is and what it solves
The Membrane Solutions Gravity Water Filter Pro is a compact, gravity-fed water filtration system designed for outdoor use, emergency preparedness, hiking and camping. It combines a 0.1-micron hollow fibre membrane with coconut shell GAC and dual PP filters to remove chlorine, sediment, odour and many contaminants from natural water sources. The result is drinking water that’s smoother in taste and safer to drink, without relying on boil times or chemical tablets.
How it works and what it filters
On the core, a 0.1-micron hollow fibre membrane tackles fine particles and microbes, paired with a coconut shell GAC stage to reduce odour and improve flavour. Two PP fibre layers provide additional filtration. In practice, this setup is pitched as capable of removing a broad range of impurities while maintaining a steady flow—about 500ml per minute. The unit is designed to be used with the gravity bag, but the straw can also function as a direct filter with extensions or by pairing with bottles or bags.
What stands out and where it may fall short
On the upside, the system appears to prioritise durability and practical usability: food-grade, BPA-free materials reduce concerns about chemical leaching, and the backwash feature (detaching the mouthpiece, connecting to a bottle for flushing) eliminates the need for extra syringes to clear clogs. The stated backwash approach keeps maintenance straightforward while on the move. A potential limitation is that performance claims—such as exact flow rate and lifetime capacity per straw (5,000 litres per unit)—rely on typical use and may vary with water quality and maintenance habits.
Who it’s for
This setup is well-suited to groups and individuals who expect to encounter variable outdoor water quality and want a reliable way to obtain drinkable water without relying on chemical tablets. It’s a practical option for backpackers, hikers, campers and disaster-preparedness kits where portability and a straightforward filtration process matter.
Who it isn’t for
If you require ultra-lightweight ultra-compact gear for quick, solo day trips, the 0.7-pound gravity system may feel heavier than a small personal straw. Likewise, if your water sources are known to be heavily polluted with chemical contaminants or heavy metals beyond the filter’s stated capabilities, you might want to consider additional treatment steps.
What to check before buying
- Confirm you’re comfortable with a gravity-based setup and the weight/size when fully stowed.
- Ensure you understand the 0.1-micron filtration level and its implications for taste and flow in your typical water sources.
- Check compatibility with the included strap and bag and think about how you’ll carry and deploy the system on your chosen activities.
- Consider how you’ll perform backwash in the field and whether you’ll need additional accessories.
Practical use case: a day on the trail
Imagine you’ve just finished a ascent and you set the 6L bag on a rock, letting gravity do the work while you snack. The water begins to flow through the straw into your bottle at a steady pace, and you notice the water tastes cleaner with less odour than from some natural sources. If you hit a clog, you detach the mouthpiece and flush via the backwash, which saves you from scrambling for extra tools.
Tech snapshot
- Filtration: 0.1-micron hollow fibre membrane + coconut shell GAC + double PP filters
- Flow: approximately 500ml/min
- Capacity: up to 5,000 litres per straw under typical conditions
- Materials: food-grade, BPA-free
- Weight: about 0.7 pounds for the complete gravity system
- Certification: SGS test evidence, NSF/ANSI 42, 372 & 401 aligned claims
Final verdict
It makes sense if you prioritise dependable filtration outdoors and value a practical backwash workflow that avoids extra syringes. It’s not the lightest option for ultra-minimalists, but for group camping or longer trips, the 6L gravity bag option and the 4-stage filtration approach offer clear benefits in taste, odour reduction and microbial safety. If your use-case includes areas with uncertain water quality and you want a hands-off approach, this system is worth considering.
FAQ
- How much water can one straw filter before replacement? The product claims up to 5,000 litres per straw under typical conditions.
- Can the straw be used directly without the gravity bag? Yes, it can function as a direct filter with extensions or when connected to bottles/bags.
- Is the water safe to drink after filtration? The system targets chlorine, sediment, odour and bacteria reduction with a 0.1-micron membrane, it aligns with consumer expectations for outdoor drinking water but always assess local water quality and backup treatment needs.
Is it worth it?
Worth considering if you need reliable outdoor filtration for groups or extended trips and you value a sturdy backwash-enabled design that minimises field maintenance. Not ideal if you’re chasing the lightest kit or only occasional, quick trips.