Access Special Features, Register Now!

Gear Review: Platypus GravityWorks 4.0L Water Treatment

Spread the joy of clean water with this group-friendly filtration system from Platypus.
BP0413ESS_Platypus_Gravity_445x260.jpgPlatypus GravityWorks 4.0L (Photo by Courtesy)

[best for groups]
For treating large quantities of water, gravity filters are the way to go. Just fill the 4-liter bladder marked “dirty” with unfiltered water, hang it, and let the water drip through the hollow-fiber filter and into the clean bladder below. “Clear water moves through quickly (four liters in about five minutes), but turbid water can take up to three minutes longer to pass through,” says one tester.

Backflushing—simply hang the clean bladder above the dirty one for a few seconds to reverse the flow—kept the filter running strong through well over 200 liters in the silty Southwest. The filter protects against protozoa and bacteria (not viruses), and packs up to liter-bottle size. $120; 11.7 oz.;

1 Comment

  1. mmartin161gmail-com

    Hands down the best. I have relied on this system for 2 trips so far and it works perfect. The huge 8L capacity is more than enough. This helps alot when camping up high away from water sources. After set up, refills, dinner, morning meals, camp clean up and a refill to hit the trail 8 liters is still plenty for 2-3 people to not have to worry about their consumption. Worth every penny.

    Profile photo of mmartin161gmail-com

Leave a Reply