Blu Technology AR3 Portable RV Water Filter System - 3 Stage - 0.2 MicronCampground water isn't always clean. Sediment, chlorine, grit, odd flavors, and even microscopic contaminants can slip right past standard RV inline filters. The goblutech AR3 RV Water Filter (GB34FR) solves that with a portable, three stage filtration system that connects to your RV hookup or pressurized water source and delivers fresh, great tasting water at every faucet and tap. Three Stages of Filtration You Can Actually Trust The AR3 doesn't rely