Saphir Pro UV
Saphir 3 Pro 45w UV 53 litres/minute
- Established 1975
- Trusted by thousands of customers
The Daro Saphir 3 Pro is a UK-made, WRAS-approved UV water steriliser for private supplies — boreholes, wells, springs and rainwater. It treats up to 53 l/min at 30 mJ/cm² (40 l/min at 40 mJ/cm²), rated at end of lamp life, through an electropolished 316 stainless steel chamber with a single 45 W GER25XOSE lamp. Sized for a larger home with several bathrooms.
Pro version: 254 nm UV sensor with digital UV intensity readout, low-UV warning, lamp-life display, volt-free contacts and 4–20 mA output.
More about this product
Daro Saphir 3 Pro UV Steriliser
The Saphir 3 Pro uses ultraviolet light at 253.7 nm to inactivate more than 99.99% of bacteria, viruses, moulds, algae and yeasts as water passes through the chamber. There are no chemicals to buy, store or dose, and nothing is added to the water — taste and smell are unchanged. It is the natural choice for private water supplies where the risk is microbiological: boreholes, wells, springs, and rainwater or greywater reuse.
Within the Saphir range, the Pro version adds a selective 254 nm UV sensor with a digital UV intensity display, low-UV warning, digital lamp-life readout, volt-free contacts and a 4–20 mA output — it measures the dose actually reaching the water rather than just whether the lamp is lit. Every Saphir is designed, built and assembled by Daro UV Systems in Sudbury, Suffolk, and is WRAS approved (2204342) with Kiwa Regulation 4 approval (2205732).
Specifications
| Model | Daro Saphir 3 Pro |
| Flow rate @ 30 mJ/cm², 98% UVT | 53 l/min (3.18 m³/h) |
| Flow rate @ 40 mJ/cm², 98% UVT | 40 l/min (2.4 m³/h) |
| Flow basis | Calculated at end of lamp life |
| Connections | ¾” BSPT male |
| UV lamp | 1 × GER25XOSE, 45 W, single-ended, low pressure |
| UVC output @ 254 nm | 13 W |
| Lamp life | 8,760 hours (about 12 months continuous) |
| Quartz sleeve | QTZ25SE — high-purity silica |
| Chamber | 316 stainless steel, electropolished |
| Reactor volume | 2.7 litres approx. |
| Chamber dry weight | 2.0 kg |
| Maximum working pressure | 10 bar |
| Water temperature | 5–23 °C normal operation; 50 °C maximum feed; must not freeze |
| Electrical supply | 110–240 V, 1-phase, 50–60 Hz, 3 A fuse |
| Power consumption | 38.5 W (0.17 A) |
| Control box | Powder-coated steel, 190 × 260 × 62 mm, 2.5 kg, IP54 |
| Mounting | Horizontal or vertical, integral fixing bracket |
| Approvals | WRAS 2204342; Kiwa Regulation 4 2205732 |
| Warranty | 12 months on the unit; 10-year guarantee on the stainless steel chamber |
Saphir Pro range — choose your size
All flows at 98% UV transmittance, rated at end of lamp life. 30 mJ/cm² is the usual domestic sizing dose; size at 40 mJ/cm² where a supply is higher risk or a specification calls for it.
| Model | Flow @ 30 mJ/cm² | Flow @ 40 mJ/cm² | Connections | Lamp |
|---|---|---|---|---|
| Saphir 1 Pro | 18 l/min | 12.5 l/min | ¾” BSPT | GER15SE (15 W) |
| Saphir 2 Pro | 30 l/min | 22.5 l/min | ¾” BSPT | GER25SE (25 W) |
| Saphir 3 Pro | 53 l/min | 40 l/min | ¾” BSPT | GER25XOSE (45 W) |
| Saphir 4 Pro | 60 l/min | 44 l/min | 1″ BSPT | GER36SE (40 W) |
| Saphir 7 Pro | 118 l/min | 88 l/min | 1″ BSPT | GER36XOSE (75 W) |
| Saphir 10 Pro | 160 l/min | 116 l/min | 1½” BSPT | GER36XOSE (75 W) |
Standard, Plus or Pro?
The chamber, lamp and flow rate are the same across all three versions of a given size — the difference is the control box and how much it tells you.
| Feature | Standard | Plus (+) | Pro |
|---|---|---|---|
| UK designed and manufactured | ✓ | ✓ | ✓ |
| Electropolished 316 stainless steel chamber | ✓ | ✓ | ✓ |
| Low-pressure UV lamp, electronic ballast | ✓ | ✓ | ✓ |
| Lamp-on indicator | ✓ | ✓ | ✓ |
| Lamp-fail and power-on indicators | – | ✓ | ✓ |
| Lamp-change reminder (365-day counter) | – | ✓ | ✓ |
| Visual alarm (lamp failure / end of life) | – | ✓ | ✓ |
| Audible alarm | – | ✓ | ✓ |
| Alarm reset button | – | ✓ | ✓ |
| Volt-free contact for telemetry or shut-off valve | – | ✓ | ✓ |
| Selective 254 nm UV sensor | – | – | ✓ |
| Digital UV intensity (%) with low-UV warning | – | – | ✓ |
| Digital lamp-life readout | – | – | ✓ |
| 4–20 mA UV intensity output | – | – | ✓ |
Monitoring and alarms
- Selective 254 nm UV sensor reads the UV intensity actually reaching the water, shown as a % on the digital display
- Adjustable set points: UV Warning (amber) and UV Low (alarm, volt-free contact opens) — e.g. Warning 70%, Low 60%
- Lamp-life countdown with alarm at 0 hours; buzzer can be silenced for 24 hours
- Chamber temperature monitoring with alarm and adjustable thermal drain point (default 25 °C)
- 7-way connector: fail-safe Lamp OK and UV OK volt-free contacts plus passive 4–20 mA UV intensity output (4 mA = 0%, 20 mA = 100%)
Spares and servicing
| Part | Code | When |
|---|---|---|
| UV lamp | GER25XOSE | Every 8,760 hours / 12 months |
| Quartz sleeve | QTZ25SE | Clean when the lamp is changed; replace if scratched or cloudy |
| Seal kit | USK15/25/36SE | Every lamp change |
Clean the outside of the quartz with a domestic scourer and 10% citric acid solution — never an industrial scourer. Inspect the quartz after the first few months to set a cleaning interval for your water. Use genuine Daro spares: the warranty is void otherwise.
Installation
- Fit after any softener, iron/manganese removal or other treatment, and after a 5–10 micron sediment filter — UV must be the last stage before the taps
- Mount horizontally or vertically on the integral bracket; leave room at the lamp end to withdraw the lamp and quartz
- Fit isolating valves either side and a bypass if the supply must stay on during servicing (bypassed water is untreated)
- Plug into a switched, earthed 13 A socket and leave the unit powered at all times; connect the earth strap between control box and chamber
- After fitting, or any time the system has been opened, flush and disinfect the pipework downstream of the unit
FAQs
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Compare Sheet PDFDownload
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manual PDFDownload
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data sheet PDFDownload
Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.
Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).
Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.
Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.
Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.
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