Platypus
GravityWorks 4.0L Filter System

5 out of 5 stars

4 Reviews

Current price: $100.89 Original price: $134.95

25% off

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Why We Like The Platypus GravityWorks 4.0L Filter System

The Platypus GravityWorks 4.0L Filter System has earned a legion of fans since coming on the scene, and with a full complement of backcountry-ready features, it's not hard to tell why. The simple setup comes with two four-liter Platy Zip reservoirs, one for our dirty water and one for our clean water, and all we have to do is place the bag full of cool, refreshing stream water above the empty bag and let gravity do the rest. After 2.5 minutes, we'll have four liters of clean, filtered water ready to drink, and if it's a trek back to the campsite, we can re-fill our dirty bag, shut the hose clamp, and we'll have a refill ready to go so our whole group can stay hydrated. To clean the filter, we simply need to reverse the bags for four seconds, which flushes away built up sediment, and our filter is ready to go once again.

Details

Gravity-powered filter for effortless hydration at the campsite
Two 4-liter bags keep clean and dirty water separate
Filters 1.75 liters per minute for near-instantaneous results
Shut-off valve allows for precise control while filling up bottles
Hollow glass-fiber filter can process up to 1500 liters in its lifetime
Large opening allows us to collect large amounts of water quickly
Simple reverse flush system allows us to clean our filter in the field
Item #PLYA08T

Material: polyethylene
Purifying Element: hollow glass-fiber
Eliminates: protozoa, bacteria, particulate, giardia, cryptosporidia, E. Coli, salmonella, cholera
Filter: hollow glass-fiber
Pore Size: 0.2 microns
Cartridge Life: 1500L
Action: gravity
Volume: 4L
Flow: 1.75L/min
Field Cleanable: yes, backflush
Includes: 1 filter, 2 4-liter reservoirs, 2 hoses, 1 shutoff clamp, 1 storage sack
Dimensions: 3.25 x 9.5in
Claimed Weight: 11.5oz
Activity: hike & camp
Manufacturer Warranty: limited lifetime

A man fills up the Platypus GravityWorks reservoir in a lake.

Fast, Easy Backcountry Filtering

A woman fills up the Platypus GravityWorks reservoir in a river.

Get Water Easily

Collecting water is easy—simply open the top, scoop water, and close. Less stress, more hydration.

Cutaway diagram of the Platypus GravityWorks 4.0L filter showing dirty water entering the top and clean water exiting the bottom through hollow fiber membranes.

Simple, Effective Filter

Every microfilter is individually tested to ensure it meets all EPA & NSF guidelines for the removal of 99.9999% of bacteria and 99.9% of protozoa.* (This includes Giardia, Cryptosporidium, E. coli, Salmonella and V. cholerae.)

A woman fills up a cooking pot with clean water from the Platypus Gravity Works.

Precise Delivery

Control delivery of filtered water with hose shutoff clamp

Hiker walks through a sunlit alpine meadow carrying a gravity water filter bag among trees and mountains.

Less Chores, More Adventure

Carry up to 8L of water at one time

Man uses Platypus GravityWorks 4.0L filter system to fill containers at a campsite while a group relaxes in the background.

Field Cleanable

Microfilter can be easily backflushed in 4 seconds to maintain filter performance

Group of campers in a forested mountain setting refill water using the Platypus GravityWorks 4.0L filter system while others relax nearby.

Filter Freely

Hollow glass-fiber filter can process up to 1500 liters in its lifetime

Camper sets up a gravity water filter on a rock at a forested campsite during golden-hour light, with others in the background.

Fill, Hang, Relax

Just fill the dirty reservoir, hang it, and let gravity do the hard work

Hiker walks through an alpine meadow carrying a filled water resevoir, with rocky, snow-dusted mountains in the background.

Two campers set up a tent on a grassy ridge with dramatic mountain peaks and backpacks nearby.

Flow On The Go

Industry-Leading Filtration

Platypus offers the finest taste-free and adventure-ready hydration and water filtration products on the planet. For over 20 years, Platypus has made water bottles and hydration solutions for everyday hydration needs from the city to the trail.

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