Platypus GravityWorks 4.0L Filter System[Product Information]- Enter your model numberto make sure this fits.
- No pumping: Just fill the dirty reservoir， hang it， and let gravity do the hard work.
- Fast: Filters up to 1.75 liters per minute; filter lifetime up to 1，500 liters of water.
- Effective: Meets all EPA & NSF guidelines for the removal of 99.9999% of bacteria and 99.9% of protozoa*.
- Group-ready: 8 liter (4.0L filtered + 4.0L dirty) total capacity easily supplies water for groups.
- Hollow Fiber Advantage: Hundreds of tiny， hollow fibers， enable the microfilter to filter water faster than traditional filter media.
