6 road-tested picks, ranked by our editorial score. Every product tested in real van life conditions — no sponsored rankings.
The dual-stage RV inline filter system that professional boondockers and full-time van dwellers trust for tank-fill water. The Clearsource Ultra's 0.2-micron second stage removes bacteria that every other inline filter misses, and the sediment pre-filter protects your 12V pump from grit that would otherwise destroy the diaphragm. Worth the price.
The bottle-style water purifier that handles viruses, bacteria, protozoa, heavy metals, and chemicals in one eight-second press. The Grayl GeoPress is the only travel-grade purifier that covers the full contaminant spectrum without electricity, pumping, or chemicals — and it's the one I carry on every van trip that crosses into backcountry or international water sources.
The gravity filter the Berkey wishes it were. 4 liters of clean water in 2.5 minutes, EPA-registered hollow fiber filter, removes bacteria + protozoa + microplastics, no electronics or pumping. This is what we recommend now for serious van water.
The honest gravity filter we recommend after the Berkey delisting. LifeStraw removes bacteria, parasites, microplastics, and most heavy metals — and Walmart actually carries it.
The minimalist backup filter. Pocket-size, 0.1 micron, and rated for 100,000+ gallons.
The fastest squeeze filter on the market. 0.1 micron hollow fiber + a collapsible 1L flask = 2 liters per minute when fresh. The right backup filter to clip onto your daypack and forget about.