RO/DI Systems
Pro-Grade Pure Water Systems
How Pure Water Cleaning Works
Three steps. Zero chemicals. Spotless results every time.
01
Tap Water Enters the System
Ordinary tap water passes through sediment and carbon pre-filters to remove chlorine, dirt, and larger contaminants before reaching the membranes.
02
RO/DI Removes All Minerals
The reverse osmosis membrane and deionization resin strip minerals down to 0 TDS (total dissolved solids), leaving water in its purest form.
03
Pure Water Cleans & Dries Spotless
Delivered through a water-fed pole, pure water dissolves dirt and rinses clean, then evaporates leaving zero residue. No squeegee required.
Why Choose a Rhodi RO/DI System?
Built for Professional Window Cleaners
Rhodi RO/DI systems deliver 0-TDS pure water that dries spotless, with no squeegeeing, no second passes, no callbacks. Professional window cleaners report finishing routes up to 50% faster.
- $500+ less than comparable systems ($1,499 vs $2,000+)
- Lifetime warranty on housing and frame. No fine print, no exclusions
- Standard replacement filters. Buy from any supplier, no lock-in
- Ships ready to connect, no assembly or programming required
- 30-day money-back guarantee, risk-free
- Lifetime support included. Phone, text, or email
Not Sure Which System Is Right For You?
Match your setup to the right system.
Best for most cleaners
Solo Operator / Residential
Running one pole on homes, storefronts, or small commercial? The Rhodi O Flow delivers consistent 0-TDS output all day and fits any van or cart setup without a permanent vehicle install.
Recommended
Rhodi O Flow
Shop the Rhodi O Flow →
Crew / Commercial / Multiple Poles
Running 2+ poles at once or cleaning above 3 stories? Flow rate and pressure requirements go up. Contact us and we'll make sure you're set up with the right configuration for your crew size and job type.
Contact Us For Help →Frequently Asked Questions
What is RO/DI water?
RO stands for Reverse Osmosis, a membrane that removes 95–99% of dissolved solids from your tap water. DI stands for Deionization, a resin stage that polishes whatever the RO membrane leaves behind, bringing output all the way down to 0 TDS. The result is water so pure it dissolves dirt on contact and evaporates completely clean, with zero mineral residue left on the glass.
Do I need a water fed pole?
Yes. The Rhodi 0 Flow produces pure water, but you need a water-fed pole to deliver it to the glass. Without a pole, you have no way to apply the water at height. The Rhodi UP and UP CORE are designed to work directly with this system.
How often do I need to replace filters and membranes?
Pre-filters (sediment and carbon) typically need replacing roughly every 3 months. They're inexpensive and easy to swap. RO membranes last years if maintained properly; if you're storing the system for a season, use a preservative like RO Guardian to protect the membrane. DI resin doesn't have a fixed schedule. Watch your TDS meter and replace when output climbs above 10 PPM. All replacement parts are standard sizes available from us or any filtration supplier.
What's included with the system?
Your Rhodi system ships fully assembled with all filters installed: sediment pre-filter, carbon pre-filter, RO membrane, and DI resin. Also included: hoses, fittings, and a TDS meter so you can confirm 0 PPM output from day one. Connect to a standard garden hose, plug in, and start cleaning. No assembly or programming required.
What TDS level will I get?
Our systems produce 0 TDS output. TDS stands for Total Dissolved Solids. At 0, there's nothing left in the water to leave a mark on the glass. It evaporates completely clean. Your included TDS meter lets you verify output at any time and tells you exactly when your DI resin is due for replacement.
How does Rhodi compare to other brands?
Rhodi systems start at $1,499, which is $500 or more less than comparable systems from other brands. Beyond price, the key differences: we use standard replacement filters available from any supplier (no proprietary lock-in), every unit ships quality-checked and ready to use, and we include a lifetime warranty on the housing and frame with no fine print. Lifetime support is also included, by phone, text, or email, for as long as you own the system. And if it's not right for you, our 30-day money-back guarantee covers it.
Do you offer replacement filters and parts?
Yes. All replacement pre-filters, RO membranes, DI resin, and accessories are available in our Accessories collection. We use standard industry sizes, so you can also source replacements from any filtration supplier if that's more convenient. Nothing is proprietary, and you'll never be waiting on a specialty part that only we carry.