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BWT bestaqua ROC ULTRA Reverse Osmosis System
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BWT bestaqua ROC ULTRA is a professional high-purity water system designed for laboratories, clinics, dental practices, medical facilities and other professional applications requiring consistently demineralised water.
The system combines two treatment technologies to achieve a significantly higher level of demineralisation than reverse osmosis alone. First, the BWT bestaqua membrane removes the majority of dissolved salts and other unwanted substances from the incoming drinking water.
The RO-treated water then passes through the BWT bestdemin PLUS mixed-bed ion exchanger, which removes remaining dissolved ions and further reduces conductivity. This two-stage process produces highly demineralised water suitable for sensitive technical and medical applications.
BWT bestaqua ROC ULTRA can be used as a central water treatment solution for equipment and processes requiring reliable low-conductivity water, including laboratory equipment, dental and clinical applications, medical devices and other professional systems sensitive to mineral deposits.
By significantly reducing dissolved minerals, the system also helps protect connected equipment against scale and mineral deposits while providing stable and reproducible water quality.
Its compact design and professional output make ROC ULTRA suitable for installation directly within clinics, dental practices, laboratories and other commercial or medical environments where high-purity water is required on site.
The system combines two treatment technologies to achieve a significantly higher level of demineralisation than reverse osmosis alone. First, the BWT bestaqua membrane removes the majority of dissolved salts and other unwanted substances from the incoming drinking water.
The RO-treated water then passes through the BWT bestdemin PLUS mixed-bed ion exchanger, which removes remaining dissolved ions and further reduces conductivity. This two-stage process produces highly demineralised water suitable for sensitive technical and medical applications.
BWT bestaqua ROC ULTRA can be used as a central water treatment solution for equipment and processes requiring reliable low-conductivity water, including laboratory equipment, dental and clinical applications, medical devices and other professional systems sensitive to mineral deposits.
By significantly reducing dissolved minerals, the system also helps protect connected equipment against scale and mineral deposits while providing stable and reproducible water quality.
Its compact design and professional output make ROC ULTRA suitable for installation directly within clinics, dental practices, laboratories and other commercial or medical environments where high-purity water is required on site.
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High-Purity Water
High-Purity Water for Medical and Laboratory Applications
BWT bestaqua ROC ULTRA is a compact professional water treatment system combining reverse osmosis with final mixed-bed demineralisation. It is designed for laboratories, dental clinics, medical facilities and technical equipment requiring consistently low-conductivity water.
01
Two-Stage Demineralisation
Reverse osmosis removes the majority of dissolved salts before the water passes through a BWT bestdemin PLUS mixed-bed ion exchanger for final demineralisation.
02
Very Low Conductivity
The combination of membrane separation and mixed-bed ion exchange produces highly demineralised water with an output conductivity below 3 µS/cm under specified operating conditions.
03
Protection for Sensitive Equipment
Removing dissolved salts helps prevent mineral deposits and residues in autoclaves, sterilisation equipment, laboratory instruments and other systems requiring high-purity water.
Technology
How BWT bestaqua ROC ULTRA Works
ROC ULTRA uses two complementary technologies. Reverse osmosis performs the primary desalination, while the integrated mixed-bed ion exchanger removes the remaining dissolved ions.
1
Reverse Osmosis
Incoming drinking water is pressurised and passed through the BWT bestaqua 14 membrane. The membrane retains more than 97% of dissolved salts and produces low-mineral permeate.
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2
Conductivity Control
The permeate is monitored and recirculated until its conductivity reaches the configured target value, providing stable water quality before final treatment.
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3
Final Demineralisation
The water passes through BWT bestdemin PLUS. Its mixed-bed ion exchanger removes remaining cations and anions, producing high-purity water with very low conductivity.
01 Incoming Water
02 Pre-Treatment
03 Reverse Osmosis
04 Mixed-Bed Demineralisation
05 High-Purity Water
Applications
Designed for Professional High-Purity Water Applications
BWT bestaqua ROC ULTRA provides demineralised water directly on site for applications where dissolved salts can affect equipment, processes or cleaning results.
01
Dental Clinics
Suitable for supplying high-purity water to dental autoclaves, sterilisation systems and other dental equipment requiring low-conductivity water.
02
Medical & Clinical Facilities
Provides demineralised water for steam sterilisation, autoclaves, washing equipment and compatible medical applications requiring reliable water quality.
03
Laboratories
High-purity water can be used for laboratory applications such as preparation of reagents and residue-free cleaning of compatible laboratory equipment.
04
Autoclaves & Sterilisers
Demineralised water helps prevent salt deposits inside steam generators, autoclaves and sterilisation equipment, reducing mineral residue on internal components.
05
Washing & Disinfection Equipment
Suitable as process water for compatible washing and disinfection systems where mineral residues from conventional tap water are undesirable.
06
Technical Applications
ROC ULTRA can also supply demineralised water to compatible technical systems and processes where consistently low conductivity is required.
High-purity water produced directly where it is needed.
No conventional bottled demineralised water handling required.
Technical Data
Technical Specifications
Key technical characteristics of the BWT bestaqua 14 ROC ULTRA reverse osmosis and final demineralisation system.
| Final system output | Up to 100 L/h |
| RO membrane permeate output | 2 L/min / 120 L/h at 15°C |
| RO salt rejection | >97% |
| Water Conversion Factor (WCF) | 50% |
| Minimum feed water flow | 4 L/min / 240 L/h |
| Nominal membrane flow | 120 L/h |
| Concentrate flow | Approx. 2 L/min / 120 L/h |
| RO operating pressure | 7 bar |
| Feed water pressure | 1.5–4 bar |
| Feed water temperature | 4–30°C |
| Ambient temperature | 4–40°C |
| Feed water TDS | <500 mg/L |
| Feed water chlorine | <0.05 mg/L |
| Iron + manganese | <0.05 mg/L |
| Silicate (SiO₂) | <15 mg/L |
| SDI | <3 |
| Final demineralisation cartridge | BWT bestdemin PLUS |
| Demineralisation technology | Mixed-bed ion exchanger |
| bestdemin PLUS nominal flow | 100 L/h |
| Output conductivity | <3 µS/cm |
| Conductivity limit signal range | 1–200 µS/cm |
| Power supply | 220–240 V / 50–60 Hz / 10 A |
| Power consumption | 200 W |
| Standby consumption | <3 W |
| Protection rating | IP21 |
| Feed water connection | M ¾" |
| Demineralised water connection | M ⅜" |
| Concentrate connection | 8 mm |
| External tank connection | 8 mm |
| Dimensions (W × D × H) | 277 × 297 × 505 mm |
| Dry weight | 17.7 kg |
| Operating weight | 21.3 kg |
| Installation | Indoor use only |
| System monitoring | BWT Professional App |
Feed Water Pre-Treatment May Be Required
BWT bestaqua ROC ULTRA must be supplied with drinking water that meets the specified feed-water requirements. In particular, free chlorine at the membrane inlet must remain below 0.05 mg/L.
Depending on the local water quality, separate particle, activated-carbon or other pre-treatment may therefore be required before the ROC ULTRA system to protect the reverse osmosis membrane and ensure reliable operation.
Water Supply → Required Pre-Treatment → BWT bestaqua ROC ULTRA → High-Purity Water
* Actual performance depends on incoming water quality, temperature, pressure and operating conditions. Suitability for a specific laboratory, medical or dental device should be checked against the water-quality requirements specified by the equipment manufacturer.
On-Site Water Production
High-Purity Water Available Directly On Site
ROC ULTRA allows professional facilities to produce demineralised water directly from the drinking-water supply, reducing dependence on externally supplied demineralised water.
01
Consistent Water Quality
Two-stage treatment provides controlled low-conductivity water independently of normal variations in mineral content within the permitted feed-water range.
02
Water When It Is Needed
Produce high-purity water directly at the facility instead of relying entirely on the storage and handling of containers of externally supplied demineralised water.
03
Compact Installation
The reverse osmosis membrane, controls and final demineralisation stage are integrated into a compact system designed for professional indoor installation.
04
Digital Monitoring
Operating parameters including conductivity, pressure, temperature, water consumption and production data can be monitored through the BWT Professional App.
FAQ
Frequently Asked Questions
Key questions about BWT bestaqua ROC ULTRA and professional production of high-purity demineralised water.
What is BWT bestaqua ROC ULTRA designed for?
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ROC ULTRA is designed to produce highly demineralised water for professional applications including laboratories, medical facilities, dental clinics, autoclaves, steam sterilisation equipment and other compatible systems requiring low-conductivity water.
Is ROC ULTRA suitable for dental clinics?
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Yes. BWT uses reverse osmosis combined with bestdemin PLUS demineralisation for dental applications requiring high-purity water, including autoclaves, dental units and compatible washing or disinfection equipment.
Can ROC ULTRA supply water to autoclaves and sterilisers?
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Yes, provided the required water quality and flow correspond to the specifications of the connected equipment. BWT bestdemin PLUS is specifically used for producing demineralised water for steam sterilisation applications in medicine and dentistry.
What makes ROC ULTRA different from a standard reverse osmosis system?
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Standard reverse osmosis removes most dissolved salts but does not completely demineralise the water. ROC ULTRA adds a second treatment stage using a mixed-bed ion exchanger, which removes remaining dissolved ions and further reduces conductivity.
What conductivity can ROC ULTRA achieve?
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BWT specifies conductivity below 3 µS/cm after the bestdemin PLUS stage under the defined operating conditions. The actual result depends on feed-water quality, cartridge condition and system settings.
What is a mixed-bed ion exchanger?
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A mixed-bed ion exchanger contains cation and anion exchange resins. These remove positively and negatively charged dissolved ions remaining after reverse osmosis, allowing substantially lower conductivity to be achieved.
What is the production capacity of ROC ULTRA?
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The reverse osmosis membrane can produce approximately 120 litres of permeate per hour at 15°C. The integrated bestdemin PLUS final treatment stage has a nominal flow capacity of 100 litres per hour, which defines the practical maximum final system output.
Can ROC ULTRA replace distilled water?
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It depends on the application. ROC ULTRA produces highly demineralised low-conductivity water, but distilled water and demineralised water are produced by different processes. Always compare the ROC ULTRA output specification with the water-quality requirements of the laboratory instrument, autoclave or medical device being supplied.
Does ROC ULTRA require pre-filtration?
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Feed water must comply with BWT membrane requirements. Because the permitted chlorine concentration is below 0.05 mg/L, appropriate activated-carbon and particle pre-treatment may be required depending on the local drinking-water quality.
Can several devices use water from one ROC ULTRA system?
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Potentially yes. The system includes an external tank connection and can form part of a central high-purity water supply installation. Correct sizing depends on the peak consumption, daily demand and water-quality requirements of all connected equipment.
Can system performance be monitored digitally?
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Yes. The BWT Professional App provides access to relevant operating parameters including conductivity, outlet pressure, water temperature, operating hours, water consumption and production volume.
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