Platypus GravityWorks Group Water Filter System
- 6 liter dirty and clean reservoirs
- 1.75 liters per minute flow rate
- 6 liters in under 4 minutes
- 99.9999% bacteria, 99.9% protozoa removal per EPA/NSF guidelines
- 1,500 gallon replaceable cartridge
- 12.3 ounces listed weight (bullets say 11.5 ounces)
- 3-year manufacturer warranty
- Made in the USA
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A no-pump gravity filter for groups that turns a hung reservoir of creek water into a full bag of clean water quickly. It needs a branch or hook to hang from and does not remove viruses according to the listing.
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ASIN: B0CV9ZRYCMCategory: Camping Water Filters
Sizes Available
Styles Available
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Overview
Platypus built the GravityWorks as a gravity-fed group filter with a hollow fiber microfilter between two reservoirs. Fill the dirty bag, hang it from a tree, and water drains through the filter into the clean bag without any pumping.
Hands-free filtering for a whole camp is what makes it worth carrying, since gravity does the work while everyone sets up. The listing says nothing about viruses or chemical removal, so water from questionable sources still needs another treatment step.
Who it's for
Group campers, families and emergency kits get the most out of the large reservoirs and hands-free flow. Solo ultralight hikers carrying one bottle will find a smaller kit lighter and simpler.
Pros and cons
- No pumping, gravity does the filtering
- Large reservoirs for group cooking
- Clean bag doubles as water storage
- Replaceable cartridge with long life
- Needs a tree or hook to hang
- Virus removal not listed
- Bulkier than single bottle filters
- Listed weight differs between bullets and specs
Performance notes
Flow depends on the height between the dirty reservoir and the clean bag, so hanging it higher speeds things up. The hollow fiber membrane traps bacteria and protozoa by size, and silty water clogs the fibers sooner. Backflushing and settled source water help hold the flow near its rated speed.
Specifications
| Brand | Platypus |
|---|---|
| Dimensions & fit | |
| Item weight | 12.3 ounces |
| Item Dimensions L x W x H | 19.5 x 10 inches |
| Capacity & performance | |
| Maximum Flow Rate | 1.75 liters per minute |
| Capacity | 6 liters |
| Filter Life Cycle | Up to 1,500 gallons |
| Power & efficiency | |
| Power Source | Gravity |
| Construction & materials | |
| Material Type | Polyethylene |
| Included components | |
| Included Components | 6-liter dirty reservoir, 6-liter clean reservoir, hollow-fiber microfilter, hoses, shutoff clamp, storage sack |
| Warranty & support | |
| Supported Water TDS Level Maximum PPM | 1000 |
| Warranty Description | 3 Year Manufacturer |
| Other details | |
| Purification Method | Hollow Fiber Membrane |
| Country of origin | USA |
| External Testing Certification | Meets EPA/NSF guidelines |
| Removal rating | 99.9999% bacteria, 99.9% protozoa |
Frequently asked questions
How do I keep the Platypus GravityWorks filter flowing well?
The listing does not give a cleaning routine. It does say the cartridge is replaceable and filters up to 1,500 gallons, and the storage sack has a PFAS-free DWR coating to keep the filter dry between trips.
What comes in the Platypus GravityWorks kit?
A 6-liter dirty water reservoir, a 6-liter clean water reservoir, the hollow-fiber microfilter, hoses, a shutoff clamp and a storage sack.
Is this the Platypus GravityWorks bottle kit?
No. This listing is the 6-liter group system with two reservoirs. The description text refers to a 2.0L bottle kit, but the specs and bullets describe the 6-liter version.