This is the perfect car wash accessory if you have hard water which causes water spots. Deionizes your water and makes you able to do a spot free rinse
The Unit I bought: https://www.portablewaterdi.com/shop/...
AR630TSS Pressure Washer: https://www.ebay.com/usr/thecleangarage
Quick Disconnect set: https://amzn.to/3yO5nYN