Mains-Fed Reverse Osmosis (RO) Water Coolers
If you are looking for water coolers connected to the mains but the tap water in your area is hard, unsafe or full of contaminants, then a standard filter system is not enough. The mains-fed Reverse Osmosis (RO) water coolers by OASIS offer the most advanced solution for pure, crystal-clear and safe drinking water.
OASIS – Water Coolers & Filters has more than 20 years of experience in drinking water solutions for homes, offices and professional spaces. Our RO water coolers are designed specifically for areas with seriously compromised water quality, where the tap water is not considered safe to drink.
OASIS RO systems use 5–6 stages of purification, with or without booster pump, removing salts, chemicals, nitrates, heavy metals and microorganisms with efficiency levels of up to 99.8%. This gives you ultra-pure drinking water directly from the mains, without the need to buy bottled water.
The RO range includes floor-standing, countertop and models with built-in fridge, so you can choose the ideal cooler for your home, office or business. If your tap water is already potable and you only need advanced filtration (without RO), you can also check our mains-fed water coolers with filters
All OASIS RO water coolers come with international certifications CE, TuV, NSF, Water Quality, FDA, ensuring top safety and material quality. With full service support and spare parts across Greece, you have long-term peace of mind.
Key Benefits of Reverse Osmosis Water Coolers
- Removal of up to 99.8% of salts, heavy metals, nitrates and microorganisms
- Ultra-pure drinking water directly from the mains
- Ideal for areas with unsafe or very hard tap water
- Significant cost savings – no more bottled water
- Models with or without booster pump, depending on water pressure
- Modern, premium design for both floor-standing and countertop units
- International certifications CE, TuV, NSF for maximum safety
Filter vs Reverse Osmosis: Which Solution Do You Need?
| Feature | Mains-Fed Cooler with Filter | Mains-Fed Cooler with RO |
| Best for | Potable or moderately hard water | Unsafe / very hard or polluted water |
| Salt reduction | ✔ Medium | ✔✔✔ Very high (up to 99.8%) |
| Heavy metals removal | ✔ Partial | ✔✔✔ Extensive |
| Taste | Good | Crystal-clear, premium |
Frequently Asked Questions (FAQ)
When do I need a Reverse Osmosis water cooler? +
Do I need a booster pump with my RO cooler? +
What maintenance does an RO cooler require? +
Oasis Certifications
- CE – European Conformity
- TuV – Quality & safety testing
- NSF – Components safe for drinking water
- WQA Water Quality Association – International recognition
- FDA Approved Components – Certified materials for potable water
OASIS | Water Coolers & Filters, the quality you deserve!
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