Deionized and Stain Free car Washing Device Water System,Spotless,Suitable for All Vehicles,RVs,Windows,Boats,Airplanes,etc.Without The Need for Towel Drying（Resin Color Change Display）

I am quite well versed in reverse osmosis and DI filters. So the advice I'm going to give you is REAL good advice, if you're looking to "spot-free rinse" your car using this setup.This is a DI (de-ionization) filter. As such, it's primary purpose in life is to remove the last bit of TDS from very clear water. This is why Reverse Osmosis DI systems HAVE a "Reverse Osmosis" system BEFORE the DI filter media (more accurately, exchange media), because you want water that's as clean and clear as possible before it hits the DI media, or your DI media will get swamped and deteriorated by all the other garbage in your water, like chlorine.So if you want the best performance out of this that you can get, and if you want the DI media to last as long as possible between changes, then do NOT do what the woman in the picture is doing where she has it hooked to a garden hose. This won't last long that way.If you are on well water: you will want to install a particulate filter before this (5 micron) as well as any filters required by your "well profile". Many well water users have high iron or manganese, so you will want to ideally install an iron/manganese filter. Some require a carbon filter because of other contaminants. If you already have these filter in place for the whole house, you should be ok. If not, you will definitely want to install them before this DI system for best results.If you are on municipal water: municipal water users can usually forego a particulate filter unless your city water has a lot of sediment in it. However, municipal water users will benefit greatly by installing a carbon block filter before this DI setup to capture things like chlorine before it hits the DI media.DI filters such as these are GREAT at getting rid of those last few molecules of hard water / TDS that leaves water spots on your car after washing. But if the water that goes into them isn't VERY clean to begin with, you will enjoy less than stellar performance from your DI system, seeing at the very least more frequent media changes, and at the worst a failure to filter anything at all when it gets overwhelmed. So understanding what a DI filter is and isn't, and what it will and won't do, is the key to getting the most out of it. Do your part and put clean water into it, and you'll get AMAZINGLY clean water out of it. 5 stars, and a great filter setup.P.S. For me personally, by the way, I don't intend to use this for washing my car...I'm setting up whole-house RO at my house and I'm going to use this DI system to produce lab-quality water from my already reverse osmosis filtered water for things like chemistry experiments where you need extremely pure water.