---
product_id: 642493601
title: "Spotless Water Systems - DIW-20, Simple Window, Solar Panel, RV & Car Wash System, Works for All Vehicles, Motorcycles, Bikes, Boats, Planes, Yachts, Towel Drying Eliminated"
brand: "cr spotless water systems"
price: "£455.48"
currency: GBP
in_stock: true
reviews_count: 11
category: "Cr Spotless Water Systems"
url: https://www.desertcart.co.uk/products/642493601-spotless-water-systems-diw-20-simple-window-solar-panel-rv
store_origin: GB
region: United Kingdom
---

# 300 gallons mineral-free water capacity Battery-powered TDS purity meter included Rust-resistant powder-coated wall mount Spotless Water Systems - DIW-20, Simple Window, Solar Panel, RV & Car Wash System, Works for All Vehicles, Motorcycles, Bikes, Boats, Planes, Yachts, Towel Drying Eliminated

**Brand:** cr spotless water systems
**Price:** £455.48
**Availability:** ✅ In Stock

## Summary

> 💦 Elevate your wash game—spotless shine, zero hassle!

## Quick Answers

- **What is this?** Spotless Water Systems - DIW-20, Simple Window, Solar Panel, RV & Car Wash System, Works for All Vehicles, Motorcycles, Bikes, Boats, Planes, Yachts, Towel Drying Eliminated by cr spotless water systems
- **How much does it cost?** £455.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/642493601-spotless-water-systems-diw-20-simple-window-solar-panel-rv)

## Best For

- cr spotless water systems enthusiasts

## Why This Product

- Trusted cr spotless water systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Monitoring:** Battery-operated TDS meter ensures every rinse is perfectly pure—no guesswork.
- • **Pro-Grade Purity at Home:** Uses dual 20-inch resin cartridges delivering up to 300 gallons of mineral-free water.
- • **Spotless Rinse, Zero Effort:** De-ionized water eliminates hard water spots—just wash, rinse, and walk away.
- • **Multi-Vehicle & Surface Ready:** Perfect for cars, RVs, boats, motorcycles, solar panels, and windows—spotless results guaranteed.
- • **Built to Last & Mount Anywhere:** Durable stainless steel and rust-resistant wall mount for sleek, space-saving installation.

## Overview

The CR Spotless DIW-20 is a compact, wall-mounted de-ionized water system designed to deliver up to 300 gallons of mineral-free water, eliminating hard water spots on vehicles, windows, and solar panels. Featuring dual 20-inch resin cartridges, a battery-powered TDS meter for water purity monitoring, and durable stainless steel construction, it offers professional-grade spot-free rinsing for multiple vehicle types and surfaces, saving time and effort while preserving finishes.

## Description

Hard water spots can destroy your vehicle’s finish. We know. That’s why we created a de-ionizing system that takes out all of the minerals in your water so you can just WASH, RINSE, and WALK AWAY! With a CR Spotless Water System, you can let your car air dry and not leave any spots behind. Besides cars, de-ionized water is perfect for washing and SPOT-FREE rinsing of your RV, boat, golf cart, motorcycle, and house windows, too! De-ionized water is the secret sauce that detailers, car washes, and window cleaners have used for decades. CR Spotless was the first to make the same technology available to homeowners in an affordable, compact, and portable system. Work smarter, not harder and spend less time and money to get the same professional looking results. The DIW-20 comes complete with 2 20 inch wall mounted cartridges containing a mixed bed of de-ionizing resin that will produce approximately 200 gallons of mineral-free water based on an average TDS level of 200 ppm. Depending on the quality of the water where you live, you can get between 75 and 1000 gallons of deionized water from one resin cartridge. All CR Spotless Water Systems also include a battery operated TDS meter that will measure the quality of the water coming out of the system. Includes two 20-inch wall mounted de-ionizing resin cartridges, Stainless Steel input Line, filter wrench, Spray nozzle, and battery operated water Purity Indicator - 1 Year

Review: Highly recommend if you want spot free washes! - This exceeded my expectations. I have a black car that I was always chasing water runs on and that is no longer an issue. My PPM went from about 160 to 0. I no longer have to spend so much time drying. I truly get a spot free rinse now. Would absolutely recommend.
Review: Solid build quality and beyond worth it for your wash station - Echoing what all others have been saying for years, but this is a game changer. Doing the rinse with DI shaves off so much time in regular washes and not having to worry about chasing drips with a towel for hours is almost life-changing. I have low ~100PPM TDS muni water with hopes the resin will last and will likely be quick to get the rv-mods conversion to remove the need for the spotless cartridges, but we'll see how long this lasts as I lock down my optimal rinse time.

## Features

- Hard water spots can destroy your vehicle’s finish, reduce efficiency with solar panels, and create a dirty appearance on windows. We know. That’s why we created a de-ionizing system that takes out all of the minerals in your water so you can just WASH, RINSE, and WALK AWAY!
- With a CR Spotless Water System, you can let your vehicle, windows, and solar panels, air dry and not leave any spots behind. De-ionized water is the secret sauce that detailers, car washes, and solar / window cleaners have used for decades.
- CR Spotless was the first to make the same technology available to homeowners in an affordable, compact, and portable system. Work smarter, not harder and spend less time and money to get the same professional looking results.
- The DIW-20 provides approximately 300 gallons of mineral-free, de-ionized water based on your water input quality. It consists of two 20 inch de-ionization housings that feature replaceable (or refillable) cartridges that simply slide into the watertight tubes.
- The entire unit is mounted on a powder coated, rust resistant wall mount that makes it convenient to mount in your desired location. Ships with all the parts and accessories needed to start rocking and rolling with all the spare time created by your CR Spotless deionized water system.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002LOJRKC |
| Best Sellers Rank | #21,079 in Automotive ( See Top 100 in Automotive ) #32 in Car Washing Applicators |
| Brand Name | CR Spotless Water Systems |
| Capacity | 300 Gallons |
| Container Type | Cartridge |
| Customer Reviews | 4.5 4.5 out of 5 stars (85) |
| Global Trade Identification Number | 00810102010056 |
| Included Components | 20" wall system, TDS meter, stainless hose, wrench, nozzle, 2 filter cartridges |
| Installation Type | Wall Mounted |
| Item Dimensions L x W x H | 15"L x 15"W x 25"H |
| Item Type Name | Deionized Water System |
| Item Weight | 27 Pounds |
| Manufacturer | CR Spotless |
| Material Type | Stainless Steel |
| Maximum Flow Rate | 2.5 Gallons Per Minute |
| Model Name | DIW-20 |
| Model Number | DIW-20 |
| Other Special Features of the Product | Chlorine Reduction |
| Part Number | DIW-20 |
| Power Source | Battery Powered |
| Purification Method | Deionization |
| Supported Water TDS Level Maximum (PPM) | 300 |
| UPC | 810102010056 619730710877 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** CR Spotless Water Systems
- **Capacity:** 300 Gallons
- **Included Components:** 20" wall system, TDS meter, stainless hose, wrench, nozzle, 2 filter cartridges
- **Installation Type:** Wall Mounted
- **Material:** Stainless Steel
- **Package Information:** Cartridge
- **Power Source:** Battery Powered
- **Product Dimensions:** 15"L x 15"W x 25"H
- **Purification Method:** Deionization
- **Special Feature:** Chlorine Reduction

## Images

![Spotless Water Systems - DIW-20, Simple Window, Solar Panel, RV & Car Wash System, Works for All Vehicles, Motorcycles, Bikes, Boats, Planes, Yachts, Towel Drying Eliminated - Image 1](https://m.media-amazon.com/images/I/610ruOmvXXL.jpg)

## Questions & Answers

**Q: Can it be used with a pressure washer?**
A: The DIC-20 can be used with a pressure washer that has a water flow rate of 2.5 gpm or less.

**Q: Can the resin be replaced by owner with bulk resin or do you need to replace the whole canister?    Do you sell bulk resin?**
A: Yes, the owner can replace their resin with bulk resin. We sell bags of resin like the R2-20 for a single exchange or we sell an RD-1 which will provide 3 exchanges. You can find these products on our website, crspotless.com.

**Q: ¿Cuantos galones puenden filtrar los cartuchos sin requerir cambio? cambio ?**
A: Con un estimado nivel de 300 galones por los doas cartuchos. Pero eso va a depender de que tan sucia esta el agua de su ciudad/casa.

**Q: What is the pressure coming out of the unit?  Can it be used to wash & rinse the vehicle or just to gently rinse?**
A: HI,

The pressure should be maintained at 2.5 gpm or less.  We recommend using it for just the final rinse to get the most life out of your resin. 

Spotless Water

## Customer Reviews

### ⭐⭐⭐⭐⭐ Highly recommend if you want spot free washes!
*by B***N on December 8, 2025*

This exceeded my expectations. I have a black car that I was always chasing water runs on and that is no longer an issue. My PPM went from about 160 to 0. I no longer have to spend so much time drying. I truly get a spot free rinse now. Would absolutely recommend.

### ⭐⭐⭐⭐⭐ Solid build quality and beyond worth it for your wash station
*by A***N on October 11, 2024*

Echoing what all others have been saying for years, but this is a game changer. Doing the rinse with DI shaves off so much time in regular washes and not having to worry about chasing drips with a towel for hours is almost life-changing. I have low ~100PPM TDS muni water with hopes the resin will last and will likely be quick to get the rv-mods conversion to remove the need for the spotless cartridges, but we'll see how long this lasts as I lock down my optimal rinse time.

### ⭐⭐⭐⭐⭐ Never Washing a Vehicle Without It
*by Z***B on March 19, 2023*

Expensive, yes. Expensive to maintain, yes. However, this is a very well made product and works as it should. I use it purely as a spot free rinse with the included hose end sprayer. This takes all the stress of trying to hurry up and clean then dry a vehicle away. Likewise, trying to deal with annoying hard water spots is now a thing of the past. I have very hard water (350-400 tds) and so far I’m at 4 rinses on an average sized SUV with the meter still reading 0 tds. Mounted this to a 2x4 with sufficient width to then screw it into studs which are 16” on center.

## Frequently Bought Together

- Spotless Water Systems - DIW-20, Simple Window, Solar Panel, RV & Car Wash System, Works for All Vehicles, Motorcycles, Bikes, Boats, Planes, Yachts, Towel Drying Eliminated
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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-12*