HydroPower Ultra L
The HydroPower Ultra L is the highest-flow pure water filter in Unger’s Ultra range. With the same 3 resin bags as the Ultra S, it produces significantly more pure water per hour — up to 2,000 m² and 20 hours per refill, compared with 600 m² and 6 hours for the Ultra S. No electricity required, with an integrated digital TDS meter and flow regulator. The choice for professionals with frequent, intensive use.
How long will the resin last with your water?
Enter your actual ppm or select your area to get an estimated guide to litres, working hours and surface area.
Calculator range: 1–2,000 ppm.
The area value is an approximate reference, not a measurement taken at your property.
At this ppm level, a HydroPower DI system may be uneconomical for regular use. We recommend considering a reverse osmosis system such as the Unger RO S.
Unger reference: incoming water TDS 275 ppm, output <10 ppm; laboratory values and approximate coverage. Values between reference points are calculator estimates, not an official Unger table.
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HydroPower Ultra L Unger — higher flow rate for intensive professional work
The HydroPower Ultra L is the step up from the Ultra S within Unger’s HydroPower Ultra range. It shares the same DI resin filtration technology and features, but its internal design allows a significantly higher flow rate — meaning you can clean more surface area in the same amount of time and greatly extend the working time between resin refills.
Ultra S vs Ultra L — the key difference
Both models use 3 resin bags of 6 litres. The difference is not the amount of resin, but the pure water production flow rate:
| Ultra S | Ultra L | |
|---|---|---|
| Resin bags | 3 × 6 l | 3 × 6 l |
| Coverage per refill | ~6 hours / ~600 m² | ~20 hours / ~2,000 m² |
| Height | 107 cm | 77 cm |
| Reference | DIUH1 | DIUH2 |
The Ultra L is the right choice for professionals with intensive maintenance routes where the Ultra S does not provide enough autonomy. For occasional use or moderate volumes, the Ultra S does the job at a lower cost.
Key features
FloWater 2.0 technology — ensures an efficient, even flow of water through all the resin, optimising its use and producing 30% more pure water per refill compared with previous systems.
Integrated digital TDS meter — displays the hardness of the purified water in real time. When the value exceeds 10 ppm, this indicates that the exhausted resin bag needs to be replaced.
Intuitive colour-coded guidance system — makes it easy to identify the equipment status quickly without consulting the manual.
KeyLock function — prevents incorrect handling when changing resin bags. Fast and error-free, even for users with no previous experience.
Pre-installed dynamic flow regulator — always ensures the optimum water flow, regardless of the available mains water pressure.
Shut-off tap — allows you to close the system during transport, preventing spills.
Metal hose connector — more durable and reliable than plastic connectors.
No electricity — operates solely using mains water pressure. Completely self-sufficient in any location.
Technical specifications
- Base: 30 × 31 cm
- Height: 77 cm
- Resin: 3 bags of 6 litres (18 litres in total)
- Coverage: ~20 hours / ~2,000 m² per refill (with medium-hard water)
- Reference: DIUH2
- Operates without electricity
Resin consumable
The Ultra L uses the DIUB3 resin pack from Unger. Available in our shop in the HydroPower Accessories section.
Ultra L or Ultra LC?
If you need to travel frequently between different work locations, the Ultra LC includes a wheeled trolley for easier transport while maintaining the same performance as the Ultra L. If you mainly work at a fixed location or with a vehicle nearby, the Ultra L is sufficient. Call us on 627 588 844 if you are unsure which model best suits your situation.
As an Unger Technical Service in Spain, we stock all spare parts and accessories for the Ultra system, with immediate delivery.
