RO / DI Purification Units

Understanding the difference is the key choosing the right gear! Think of Reverse Osmosis (RO) and Deionisation (DI) as a powerful one-two punch in a water purification unit. Reverse Osmosis is the workhorse. It uses a special, super-fine membrane to filter out the vast majority (around 95-98%) of all minerals and total dissolved solids (TDS) from your tap water. It does the heavy lifting, especially in hard water areas.

Deionisation is the polisher. After the RO membrane has done its job, the water flows through a DI resin filter. This resin uses an ion-exchange process to grab and remove the last remaining TDS, getting the water to an ultra-pure state of 0 ppm (parts per million). While a DI-only system can work in soft water areas, combining it with RO in hard water areas is far more economical, as the RO stage protects the DI resin from being used up too quickly. This combined RO/DI process guarantees you get that perfect, spot-free finish every time.

Investing in an RO/DI water purification unit is an absolute game-changer for any professional exterior cleaner, especially if you're cleaning windows or solar panels. The number one benefit is achieving a flawless, spot-free finish every single time! These units combine Reverse Osmosis (RO) and Deionisation (DI) to strip virtually all total dissolved solids (TDS) from your source water. When this pure water dries, it leaves absolutely nothing behind—no frustrating mineral spots or streaks.

This leads to the next huge advantage: incredible efficiency! You can just wash, rinse with pure water, and walk away, letting the surface air-dry perfectly. This completely eliminates the slow, manual process of using a squeegee, which dramatically cuts down your time on-site. You'll complete jobs faster, fit more work into your day, and boost your profitability. It's a smarter, more professional way to work that delivers superior results.

Choosing the perfect RO/DI water purification unit is a brilliant move, and getting it right is all about matching the gear to your specific situation! The two biggest factors to consider are your local water quality and the volume of work you do. The first step is to test your tap water's hardness using a TDS (Total Dissolved Solids) meter. This will tell you how much mineral content the unit needs to remove.

If you work in a soft water area (generally under 150 ppm TDS), a DI-only system might be enough for occasional use. However, for true professionals and anyone in a hard water area, a full RO/DI system is the only way to go! The Reverse Osmosis (RO) membrane will do the heavy lifting, removing about 98% of the TDS, which makes your Deionisation (DI) resin last so much longer. This saves you a huge amount of money on running costs and ensures you consistently produce the ultra-pure water needed for a perfect spot-free finish

Proper maintenance is the secret to keeping your RO/DI water purification unit performing at its peak and delivering those amazing spot-free results for years to come. Your most important tool here is a digital TDS meter. You need to regularly check the TDS (Total Dissolved Solids) reading of the water coming out of your system. Once it starts to creep up above 10 parts per million (ppm), it's a clear signal that your filters need attention.

Your DI resin filter is what gives the water its final polish, so this is the most frequent change you'll make. When your TDS readings rise, it's time for a new DI cartridge. For the RO side of the system, you'll also need to replace the sediment and carbon pre-filters every few months. This protects the delicate RO membrane, which is the heart of the unit. Following these simple steps ensures your unit consistently produces ultra-pure water, protecting your investment and guaranteeing a flawless finish on every job.