Review on 💧 WaterSentinel SF-20W: Spotless Car Wash Water Filter & Extension Adapter for All Vehicles, Homes & More - Deionized, Spot Free Technology! by Mark Gancio

A little skeptical at first but this product really works. Tested with a ppm meter and my garden hose water dropped a few hundred ppm. Be sure to read the instructions that come with this product to minimize water stains when washing your car. 1) Wet your car, then wash and rinse as if you were using regular water on a regular basis. 2) After rinsing out all your car wash soap, use this filter attached to your garden hose to rinse away any remaining hard water.