---
product_id: 653128572
title: "Spotless Water Systems - DIW-20B, W/Integrated Bypass | 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: "$1601.41"
currency: USD
in_stock: true
reviews_count: 6
category: "Cr Spotless Water Systems"
url: https://www.desertcart.us/products/653128572-spotless-water-systems-diw-20b-w-integrated-bypass-simple-window
store_origin: US
region: United States of America
---

# Battery-powered TDS purity meter Integrated bypass for resin savings Dual 20" resin cartridges Spotless Water Systems - DIW-20B, W/Integrated Bypass | 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:** $1601.41
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your wash game—spotless water, zero spots, total envy.

## Quick Answers

- **What is this?** Spotless Water Systems - DIW-20B, W/Integrated Bypass | 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?** $1601.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/653128572-spotless-water-systems-diw-20b-w-integrated-bypass-simple-window)

## 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

- • **Compact & Wall-Mounted Design:** Space-saving 36"x18"x17" footprint fits perfectly in home garages or professional setups.
- • **Effortless Resin Conservation:** Switch seamlessly between filtration and bypass modes to extend resin life and cut costs.
- • **Versatile Vehicle Compatibility:** Perfect for cars, motorcycles, boats, RVs, and even planes—spotless water for every ride.
- • **Real-Time Water Purity Monitoring:** Battery-operated TDS meter ensures you always know when to replace filters for peak performance.
- • **Professional-Grade Spotless Finish:** Deionized water rinse eliminates towel drying and hard water spots for a flawless shine every time.

## Overview

The Spotless Water Systems DIW-20B is a solar-powered, wall-mounted deionizing water system delivering up to 300 gallons of ultra-pure water per resin cycle. Featuring an integrated bypass to conserve resin, dual 20-inch filter cartridges, and a battery-operated TDS meter, it guarantees professional-grade, spot-free rinses for all vehicle types. Compact and efficient, it’s engineered to save time, reduce water spots, and elevate your vehicle care routine.

## Description

Wall mounted water deionizing system. Introducing the DIW-20, our high-output deionized water system, designed to deliver approximately 300 gallons of spotless water, depending on your tap water quality. The system includes dual 20-inch resin filter cartridges, a battery-operated water purity indicator (TDS Meter), a filter wrench, and a spray nozzle. The included spray nozzle helps you maximize your filter's DI water production by restricting flow to less than 2.5 gallons per minute when set to flat or center. With compact dimensions of 36" x 18" x 17", the DIW-20 is the perfect solution for both home and professional use. Achieve professional-grade cleaning results with the DIW-20 the ultimate in convenience and efficiency for spotless water. Estimated volume will depend on the TDS (Total Dissolved Solids) in your local water supply and system.

Review: If you have $400 burning a hole in your pocket, this is the Deionizing System for you - UPDATE: After 3 months of use my TDS meter has gone from 000 to 007. I do not have a good idea of how many washes I have on the first two cartridges. I have ordered 4 more bags of resin which I think gives me 2 refills. I've also ordered an inline gallon meter so I can see exactly how many gallons between resin changes. Best I can estimate is I have about 20 car washes (2 cars) and 4 Large motorhome washes. Im assuming I'll get another couple of washes in, so maybe 30 uses and it's about $100 per recharge using CR Spotless resin. So maybe $3 per use? I'Ve been using the DI rinse pretty liberally so far. I think I'll set up a second hose for the initial wash and soap rinse off and just use the DI for a final rinse. Also need to make sure I'm not getting alge growth. I have 2 cars and a motorhome and I like washing them. They are all dark, metallic colors and I don't have a nice shady spot to wash them in. Being in Florida the sun can dry the car surface way before you can dry it by hand, leaving hard water spots that are make the car look worse than when you started. I'd been looking into building my own DI system for a while, but my time is limited and I could not find a good DYI project to copy. Another problem is that DI systems are lost in the noise of all the BS surrounding home water treatment systems which I mostly view as a scams. As usual, I figured the only way to know for sure would be to buy one, try it out and if it just doesn't work, send it back. I ordered the CR systems (the large one) which uses mixed bead deionizing cartridges. The cartridges are replaceable, or you can buy new mixed bead resin for around $40/cartridge. $80 sounds like a lot depending on how often you have to recharge your system and since I just got mine I have no idea how long these will last. Let me get the punch line out first. The system works great! I washed my Honda and Lexus and left them in the morning sun to dry. No spots at all. I washed the fender of my son's truck (dark charcoal) and rinsed it with the CR and let it dry. Then I sprayed about half of the area with normal untreated water and let that dry. See the attached picture for the results. The photo isn't great, but you can see on the left side obvious spots and nothing on the right side. The question of course is how long the systems will last before needing new resin beads. The manual says you should get between 800 and 1300 gallons per charge. We'll see. Another problem I've read about is that if you leave water in the system too long (I have no idea what "too long" means, algae grows and ruins the resin beads). Since I wash cars once a week, I'm hoping this won't be a problem. I also think the life of the beads has to do with how hard you water is and what types of contaminants are in there. I've just installed a new water softener for the house, so I'm assuming this will help increase the life between resin changes. As far as the design and construction of the system itself I'd give the manufacture an A all the way around. The unit is on a nicely built tube cart with wheels. It seems to be very well balanced and I don't think it will tip over very easily. All the parts appear well engineered and built well. The only problem is a slight leak at where you have to install the hose inlets and outlets. The manual says to put at least two wraps of teflon tape on the threads (tape is supplied, and I put 3 wraps on). But water still dribbles out of the connection a bit. I'm going to take it apart and put another wrap or two of teflon and try it again. Obviously this is an "out of the box" review with one day's use on it. I will update as I go.
Review: Great for Hot & Sunny Home/Auto Environment's - Living in a dry/hot environment, I struggled with water spots constantly drying on my car and windows before I could even reach for a towel. This water filter has been a game-changer, eliminating that issue entirely. It leaves my car and windows with a flawless, streak-free shine after air drying, saving me significant time and frustration. It's a user-friendly tool that has drastically simplified my cleaning routine. I highly recommend the wheeled version, as it can get heavy when filled with water. Professional-level results every time.

## Features

- Integrated bypass.
- Clean & Integrated Bypass Feature: Effortlessly switch between filtration and bypass modes with a seamlessly integrated bypass system, conserving expensive resin and ensuring high-quality filtered water is reserved for the final rinse.
- Material: Stainless Steel
- Purification method: Deionization
- Capacity: 300.0 gallons
- Included components: 20" wall system, TDS meter, stainless hose, wrench, nozzle, 2 filter cartridges

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DBJ7KD1D |
| Best Sellers Rank | #22,922 in Automotive ( See Top 100 in Automotive ) #28 in Car Washing Applicators |
| Brand | CR Spotless Water Systems |
| Date First Available | October 14, 2018 |
| Installation Type | Wall Mount |
| Is Discontinued By Manufacturer | No |
| Item model number | DIW-20B. |
| Manufacturer | Spotless Water Systems. |
| Maximum Flow Rate | 2.5 Gallons Per Minute |
| Model Name | DIW-20B. |
| Power Source | Solar Powered |
| Product Dimensions | 15"L x 15"W x 25"H |
| Supported Water TDS Level Maximum (PPM) | 2000 |
| UPC | 810102010278 653958490685 |

## Product Details

- **Brand:** CR Spotless Water Systems
- **Capacity:** 300 Gallons
- **Included Components:** Filter, Inlet Hose, Outlet Hose, Instruction Manual
- **Installation Type:** Wall Mount
- **Material:** Stainless Steel
- **Maximum Flow Rate:** 2.5 Gallons Per Minute
- **Model Name:** DIW-20B.
- **Power Source:** Solar Powered
- **Product Dimensions:** 15"L x 15"W x 25"H
- **Purification Method:** Deionization

## Images

![Spotless Water Systems - DIW-20B, W/Integrated Bypass | 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/71ecUJnxZpL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ If you have $400 burning a hole in your pocket, this is the Deionizing System for you
*by B***B on November 15, 2015*

UPDATE: After 3 months of use my TDS meter has gone from 000 to 007. I do not have a good idea of how many washes I have on the first two cartridges. I have ordered 4 more bags of resin which I think gives me 2 refills. I've also ordered an inline gallon meter so I can see exactly how many gallons between resin changes. Best I can estimate is I have about 20 car washes (2 cars) and 4 Large motorhome washes. Im assuming I'll get another couple of washes in, so maybe 30 uses and it's about $100 per recharge using CR Spotless resin. So maybe $3 per use? I'Ve been using the DI rinse pretty liberally so far. I think I'll set up a second hose for the initial wash and soap rinse off and just use the DI for a final rinse. Also need to make sure I'm not getting alge growth. I have 2 cars and a motorhome and I like washing them. They are all dark, metallic colors and I don't have a nice shady spot to wash them in. Being in Florida the sun can dry the car surface way before you can dry it by hand, leaving hard water spots that are make the car look worse than when you started. I'd been looking into building my own DI system for a while, but my time is limited and I could not find a good DYI project to copy. Another problem is that DI systems are lost in the noise of all the BS surrounding home water treatment systems which I mostly view as a scams. As usual, I figured the only way to know for sure would be to buy one, try it out and if it just doesn't work, send it back. I ordered the CR systems (the large one) which uses mixed bead deionizing cartridges. The cartridges are replaceable, or you can buy new mixed bead resin for around $40/cartridge. $80 sounds like a lot depending on how often you have to recharge your system and since I just got mine I have no idea how long these will last. Let me get the punch line out first. The system works great! I washed my Honda and Lexus and left them in the morning sun to dry. No spots at all. I washed the fender of my son's truck (dark charcoal) and rinsed it with the CR and let it dry. Then I sprayed about half of the area with normal untreated water and let that dry. See the attached picture for the results. The photo isn't great, but you can see on the left side obvious spots and nothing on the right side. The question of course is how long the systems will last before needing new resin beads. The manual says you should get between 800 and 1300 gallons per charge. We'll see. Another problem I've read about is that if you leave water in the system too long (I have no idea what "too long" means, algae grows and ruins the resin beads). Since I wash cars once a week, I'm hoping this won't be a problem. I also think the life of the beads has to do with how hard you water is and what types of contaminants are in there. I've just installed a new water softener for the house, so I'm assuming this will help increase the life between resin changes. As far as the design and construction of the system itself I'd give the manufacture an A all the way around. The unit is on a nicely built tube cart with wheels. It seems to be very well balanced and I don't think it will tip over very easily. All the parts appear well engineered and built well. The only problem is a slight leak at where you have to install the hose inlets and outlets. The manual says to put at least two wraps of teflon tape on the threads (tape is supplied, and I put 3 wraps on). But water still dribbles out of the connection a bit. I'm going to take it apart and put another wrap or two of teflon and try it again. Obviously this is an "out of the box" review with one day's use on it. I will update as I go.

### ⭐⭐⭐⭐⭐ Great for Hot & Sunny Home/Auto Environment's
*by M***M on May 31, 2024*

Living in a dry/hot environment, I struggled with water spots constantly drying on my car and windows before I could even reach for a towel. This water filter has been a game-changer, eliminating that issue entirely. It leaves my car and windows with a flawless, streak-free shine after air drying, saving me significant time and frustration. It's a user-friendly tool that has drastically simplified my cleaning routine. I highly recommend the wheeled version, as it can get heavy when filled with water. Professional-level results every time.

### ⭐⭐⭐⭐⭐ here in the Pacific NW (Washington State) we have calcium and lime in our city water that leaves horrible hard water spots that
*by R***. on October 25, 2016*

Works exactly as advertised. Water quality (the amount of minerals in your water the filter has to remove) varies greatly around the USA, here in the Pacific NW (Washington State) we have calcium and lime in our city water that leaves horrible hard water spots that are very difficult to remove after they dry. So at a minimum you can't wash your vehicle when its warm out, certainly not in direct sunlight. Even in the shade its a race to try to towel dry before the spots form and honestly took all the enjoyment out of washing your vehicle. Then due to back and hip issues it became pretty much impossible to towel dry so I purchased a CR Spotless system. Wow it works just like they said, wash and rinse in full sunlight then just walk away and let it air dry, ZERO spots. I did adjust my water pressure to about 2 gallons flow per minute. Just timed how long it took to fill up a gallon jug, adjusted my faucet to fill it in 30 seconds. This is more than enough pressure to wash and rinse a vehicle, even thought I have a pressure washer I found no reason to use it. I did chuck the included cheap hose nozzle in the trash and purchased a nice one at my Wilco farm store. I have washed my 2016 BMW X5 xDrive 35i 4 times now, the mineralization meter still reads zero, no water spots. NOTE: My brother recently purchased one of these units to remove the minerals from the water he was mixing with coolant for his $200k Mori Seki CNC lathe.

## Frequently Bought Together

- Spotless Water Systems - DIW-20B, W/Integrated Bypass | Simple Window, Solar Panel, RV & Car Wash System, Works for All Vehicles, Motorcycles, Bikes, Boats, Planes, Yachts, Towel Drying Eliminated
- CR Spotless RC2-20 Replacement Cartridges For DIwith DIC-20
- CR Spotless R2-20 Refill Resin for DI-20 Systems, 1 Pack

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-12*