best inline RV water filters: 8 models tested & compared (2026)

kohree inline water filter being tested with tds meter showing 98 ppm reduction at arizona desert campground with testing equipment visible

why inline filters are the most popular choice When I started RVing eight years ago, the first upgrade I made was an inline water filter. Not solar panels, not a fancy awning – a simple $22 cylinder that screws between my hose and RV. It’s still the upgrade I recommend most to new RVers. Here’s … Read more