Who is the Flex Duplex UV-C System Designed For?
The Flex Duplex UV-C ultraviolet water treatment system (a Fluidra / AstralPool brand) is the ideal solution for pool owners seeking crystal-clear, healthy water while drastically reducing chemical usage. Engineered for residential swimming pools up to 120 m³, this range combines high disinfection performance with exceptional durability, fitting seamlessly into new pool installations as well as plant room renovation projects.
Its main advantage lies in its reflective Duplex stainless steel casing, which maximizes the internal reflection of UV-C rays, boosting disinfection efficiency by up to +35% during each filtration cycle. Furthermore, its ultra-high resistance to corrosion makes it 100% compatible with saltwater chlorination systems (handling salinity levels up to 50 g/L), active oxygen, or traditional chlorine treatment.
Key Features & Benefits
- Increased Reflectivity (+35% Efficiency): The polished Duplex stainless steel inner chamber reflects UV-C radiation, enhancing the elimination of microorganisms, bacteria, and chloramines without increasing power consumption.
- High Salt and Corrosion Resistance: Built with ultra-durable Duplex stainless steel, making it perfectly suitable for saltwater pools with elevated salinity levels (up to 50 g/L).
- Flexible & Adaptable Installation: The innovative design allows for inline (U-shape) or bypass (S-shape) configuration. By reversing the side cap with the water outlet, the flow easily adapts to your existing pipework layout without complex plumbing adjustments.
- Long-Life UV Lamps: High-output T5 and T6 UV lamps with an extended lifespan of up to 16,000 hours, ensuring worry-free swimming seasons and low maintenance requirements.
- Eco-Friendly & Safe Disinfection: Drastically reduces the need for harsh chemicals and eliminates unpleasant odors and eye/skin irritation caused by chloramines, providing a superior bathing experience.
Technical Specifications and Models
| FEATURE | FLEX DUPLEX 21W | FLEX DUPLEX 40W | FLEX DUPLEX 60W | FLEX DUPLEX 80W | FLEX DUPLEX 140W |
|---|---|---|---|---|---|
| UV Output / Power Consumption | 21 W | 42 W | 60 W | 80 W | 140 W |
| Max. Pool Volume | 18 m³ | 40 m³ | 55 m³ | 80 m³ | 120 m³ |
| Recommended Flow Rate (30mJ/cm²) | 3.5 m³/h | 8 m³/h | 11 m³/h | 16 m³/h | 22 m³/h |
| Flow Switch | Not included | Included | Included | Included | Included |
| Min. / Max. Flow Rate | 0.5 / 23 m³/h | 0.5 / 23 m³/h | 0.5 / 23 m³/h | 0.5 / 23 m³/h | 3.0 / 23 m³/h |
| UV Lamp Type | T5 21W 4P | T5 40W 4P | T5 60W 4P | T5 80W HO 4P | T6 140W Amalgam 4P |
| Lamp Lifespan | 9,000 h | 9,000 h | 9,000 h | 9,000 h | 16,000 h |
| Inlet / Outlet Connections | Ø 63 / 50 mm / 1″1/2 | Ø 63 / 50 mm / 1″1/2 | Ø 63 / 50 mm / 1″1/2 | Ø 63 / 50 mm | Ø 63 / 50 mm |
| Max. Working Pressure | 2.5 bar (2.5 kg/cm²) | ||||
| Salinity Compatibility | Up to 50 g/L (Ideal for salt pools) | ||||
Frequently Asked Questions (FAQ)
Does the UV-C system completely replace chlorine or salt chlorination?
UV-C treatment is a highly effective primary disinfection method that destroys bacteria, viruses, and chloramines as water passes through the chamber. However, because it works strictly in-line (only treating water passing through the reactor unit), it is recommended to maintain a minimal residual level of sanitizer in the pool basin (via chlorine or salt chlorination), allowing you to reduce overall chemical consumption by up to 70–80%.
Can I install the Flex Duplex on a pool with a salt chlorination system?
Yes! Unlike conventional stainless steel systems (such as 316L inox) which can corrode under high salt concentrations, the Flex Duplex is crafted from heavy-duty Duplex Stainless Steel, supporting salinity levels up to 50 g/L (far above the standard 4 to 5 g/L used in saltwater pools).
What is the difference between inline (U) and bypass (S) installation?
The unit’s versatile design lets you align the inlet and outlet ports to match your plant room’s plumbing layout. By swapping the position of the side cap and the water outlet connection, the system easily adapts to the direction of your existing water flow, preventing unnecessary pipe elbows and simplifying bypass installation for fast servicing.
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