Membrane Solutions Gravity Water Filter Pro 6L
- Item Weight: 0.8 pounds
- Purification Method: Hollow Fiber Membrane
- Maximum Flow Rate: 500 milliliters per minute
- Container Type: Box
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Group camping is the clear use case here, with the same NSF-tested filtration stages as the brand's straw filters scaled into a shared, gravity-fed bag.
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ASIN: B08ZYMXLMHCategory: Camping Water Filters
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Overview
Sized for group camping, the Membrane Solutions 6L Gravity Water Filter Pro is a gravity-fed bag rated to NSF/ANSI 42, 372 and 401 standards, serving 3 to 6 people per fill.
Where the smaller straw filters in this lineup serve one person at a time, this one scales the same filtration stages into a hanging bag so a group can share one setup at basecamp. The tradeoff is speed: gravity feeding at half a liter a minute means filling several liters takes real time, worth planning around before a trip.
- 6-liter gravity-fed bag for groups
- 0.1 micron four-stage filtration
- NSF/ANSI 42, 372, 401 certified
- Puncture-resistant bag with hanging strap
Who it's for
Fits group campsites, basecamps and off-grid setups where water can be filtered in advance and left to drain. Not suited to anyone needing a quick single sip on the move, where a straw or bottle filter is a better fit.
Pros and cons
- Serves 3-6 people from one 6-liter bag
- No pumping, batteries or moving parts needed
- NSF/ANSI certified for chlorine and sediment
- Collapsible bag packs down for storage
- Gravity flow is slow, about 0.5 L per minute
Performance notes
Water passes through a 0.1 micron hollow fiber membrane, coconut shell activated carbon and dual PP pre-filters, rated to NSF/ANSI 42, 372 and 401 standards and good for up to 1,320 gallons (5,000 liters) before the filter needs replacing. The bag itself is described as puncture-resistant and BPA-free with a reinforced hanging strap, and it collapses for packing.
Specifications
| Brand | Membrane Solutions |
|---|---|
| Dimensions & fit | |
| Item Weight | 0.8 pounds |
| Item Dimensions L x W x H | 3.9 × 2.3 × 10.6 inches |
| Capacity & performance | |
| Maximum Flow Rate | 500 milliliters per minute |
| Capacity | 1.6 gallons |
| Power & efficiency | |
| Power Source | Gravity |
| Construction & materials | |
| Material Type | TPU |
| Compatibility & installation | |
| Installation Type | Not Required |
| Warranty & support | |
| Supported Water TDS Level Maximum PPM | 500 |
| Warranty Description | 1 year |
| Other details | |
| Purification Method | Hollow Fiber Membrane |
| Container Type | Box |
| Number of Items | 1 |
| Part Number | OESF021_M1 |
| Other Special Features of the Product | Chlorine Reduction |
Frequently asked questions
How many people can the Membrane Solutions 6L Gravity Filter Pro serve?
It is sized for group camping, with the listing citing enough capacity for 3 to 6 people from one 6-liter bag.
Does this gravity filter need a pump or batteries?
No, it is gravity fed at up to about 0.5 liters per minute, so it just needs to be filled and hung to drain through the filter on its own.
What certifications back the Membrane Solutions 6L filter?
It is listed as tested to NSF/ANSI 42, 372 and 401 standards for chlorine, sediment and odor reduction, with a rated filter life up to 1,320 gallons (5,000 liters).