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Refurbished RO systems
Tested and inspected RO systems for pure water at a reduced price.
See offersRO system + water softener pack
Complete protection with an RO system and a water softener.
Get 15% offRO system + hydrogen water generator pack
Combine reverse osmosis water and hydrogen-rich water.
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FREE SHIPPING
On orders of €150 or more within mainland France
(home products only)
Ships within 24 hours
+33 3 66 88 17 85
Call us Monday to Friday,
9:30 am–5 pm (Paris time)!
Email: contact@josmose.fr
Robustos Mini 50 l/h - High-Quality Direct-Flow RO System with Booster Pump
Low-Waste RO Systems
Product video
Frequently bought together
Certifications
Certifications
Quality accreditations for our RO systems
RoHS
Restriction of Hazardous Substances
The RoHS directive regulates the use of certain hazardous substances in electrical and electronic equipment to limit their presence in the components concerned.
CE marking
European conformity
CE marking indicates that the product concerned meets the applicable European requirements allowing it to be placed on the market within the European Economic Area.
FDA
U.S. Food and Drug Administration
The FDA is the U.S. authority responsible, among other things, for regulating many products related to food, health, and consumer safety.
Water Quality
Water treatment industry
This accreditation is associated with the water treatment and filtration industry and helps identify products that meet the relevant standards.
ISO 9001 & ISO 14001
Quality and environmental management
The ISO 9001 standard covers quality management systems, while the ISO 14001 standard addresses environmental management.
NSF
Standards related to water and public health safety
NSF develops, among other things, standards and evaluation protocols applicable to equipment and components used in water treatment.
Water quality and NSF certification
Understanding certification standards and the assurances associated with reverse osmosis membranes.
Are your RO systems NSF certified?
A reverse osmosis membrane referenced in Josmose documentation, the RHD3013-600, holds NSF/ANSI 58 certification covering the safety of its materials. This certification does not mean that all Josmose RO systems are NSF certified. The scope of certification must always be checked for the model and components concerned.
What exactly does NSF 58 certification guarantee?
The NSF/ANSI 58 standard covers, among other things, material safety and certain characteristics of reverse osmosis systems. For the RHD3013-600 membrane, the test documents indicate an analysis covering more than 150 substances, including solvents, phthalates, nitrosamines, and hydrocarbons. No exceedances of the applicable thresholds were found. Please note: this material certification does not validate the contaminant reduction rates of the complete RO system.
What is the difference between NSF 58 and NSF 61?
The NSF/ANSI 58 standard covers home reverse osmosis water treatment systems. The NSF/ANSI 61 standard primarily addresses materials and components in drinking water distribution installations, such as pipes and valves. The two standards serve different purposes and rely on appropriate safety criteria.
How can you verify NSF certification?
Visit the official NSF website and consult the drinking water treatment equipment database. Search for the manufacturer Ningbo RXHL Technology and model RHD3013-600. Check that the certificate matches the component used in your unit and review the characteristics actually covered.
Where are the RO systems and their membranes manufactured?
Josmose technical documentation indicates that they are manufactured in China. The manufacturer of the RHD3013-600 membrane, Ningbo RXHL Technology, is monitored by NSF as part of its certification. Manufacturing origin alone is not enough to determine the quality of an RO system: materials, checks performed, and traceability are also essential.
Do you have test results for the filtered water?
Independent testing of the units is listed as ongoing in our documentation. A TDS tester also lets you measure the total amount of dissolved solids in the water before and after filtration. This measurement provides an indication of how reverse osmosis is working, but cannot, on its own, verify the absence of PFAS, pesticides, or other specific contaminants.
Specifications
Specifications
Robustos Mini technical data
| Specification | Robustos Mini |
| Technology | Direct-flow reverse osmosis – 5 filtration stages |
| Production capacity | 800 GPD – up to 1000 L/day |
| Accepted water type | Cold drinking water, between 5 °C and 45 °C |
| Recommended inlet pressure | 1 to 4 bar |
| Water connection | 1/4" fittings |
| Dimensions | Approx. 43.4 × 14.5 × 40 cm |
| Weight | Approx. 10 kg |
| Power supply | Yes – built-in pump |
| Maintenance | Replace filters every 6 to 12 months, membrane every 24 months |
| Warranty | 2 years – 5-year extension available as an option |
Installation & Maintenance
Installation
Installing your Robustos RO system
Follow our video and the installation manual to set up your RO system and quickly start enjoying your RO water.
Installation guide
To complement the manual and the video, also see our guide to installing a home RO system .
Need help?
Our tips for a successful installation
Phone support if needed
When you buy an OJA RO system, you also get free phone assistance to help you with the installation if needed.
If your water pressure is insufficient, you can opt for our home RO system pump .
Need help choosing? See our buying guide or call us at 09 72 55 18 50.
Connecting to the cold water inlet
Sealing tip: apply at least 10 turns of Teflon tape, supplied with the RO system, clockwise on each thread.
Need a T-fitting with a different diameter? Email us your order number and we will send it to you free of charge.
Maintenance
How do you maintain your Robustos RO system?
Maintaining the Robustos is simple and affordable. Regularly replacing the filters, cartridges, and membrane preserves your RO system’s everyday filtration performance.
Cost-effective solution
Robustos maintenance kit
To simplify maintenance, we designed a complete kit with the main consumables needed for 2 to 3 years of maintenance.
- 3 Filmtec 100 GPD membranes
- 4 PP filters
- 4 GAC 10-inch filters
- 2 CTO filters
250 € 199.90 €
Discover the maintenance kit 
Peace of mind
Extended warranty up to 5 years
Your RO system comes with a 2-year warranty as standard.
You can opt for the5-year extended warranty. It covers the pump, the frame, the fittings, and the electronics, excluding filters.
Discover the extended warrantyDocuments
User Manual
Robustos Mini documentation
User manual
Find the information you need to install, set up, use and maintain your Robustos Mini RO system.
Download the user manualFAQ
Frequently Asked Questions
Everything you need to know about the Robustos
Is the Robustos easy to install?
Yes. It comes complete with the accessories needed for installation: fittings, tubing, an installation wrench and a user manual. An installation video is also available, and our support team can assist you if needed.
How often does it need maintenance?
Pre-filters and post-filters generally need to be replaced every 6 to 12 months. The membrane needs to be replaced about every 24 months. Maintenance kits are also available so you can plan ahead for consumable changes.
Does the Robustos need to be plugged into electricity?
Yes. The Robustos has a built-in pump that requires a power supply and keeps the system running while delivering a high production flow rate.
Can you add minerals to RO water?
Yes. Remineralization filter cartridges such as MineralStone and AquaCalcium can be added to remineralize RO water.
Is there a leak protection system?
The Robustos does not come with a built-in leak protection device by default. However, you can add a compatible safety system, available as an option.
What should I do if my RO system has a bad smell?
An unusual odor can indicate that the system needs maintenance or cleaning. Read our guide to cleaning a reverse osmosis system .
What are the benefits of a direct-flow (tankless) RO system like the Robustos?
Direct-flow operation produces RO water without a storage tank. The Robustos combines on-demand production, a compact size and simplified maintenance.
Professor Henry debunks common myths about water
Watch videos debunking a few common myths about water and water filtration.
Tap water is of good quality.FALSE |
A filter pitcher is enough to purify tap water.FALSE |
It is better to drink mineralized water.FALSE |
To be sure, you need to use a reverse osmosis system.TRUE |
Reverse Osmosis
Benefits of reverse osmosis
High-precision filtration for everyday water
A reverse osmosis system uses the principle of reverse osmosis to reduce many dissolved substances and impurities present in water. This technology produces highly purified water, available directly at the faucet or water dispenser.
Why choose reverse osmosis?
The main benefits
- High-precision filtration: reverse osmosis reduces a wide range of substances present in water.
- Micropollutant reduction: the membrane acts as an especially fine barrier against many dissolved contaminants.
- Better taste and odor: filtration helps reduce chlorine in particular, along with compounds that can affect the organoleptic qualities of water.
- Fewer bottles: having filtered water at home or at work reduces the buying, storing and carrying of bottles.
- Reduced mineral content: reverse osmosis greatly reduces dissolved mineral salts, including those responsible for limescale buildup.
- Less plastic waste: a great way to cut down on single-use bottles.
Reverse osmosis or ultrafiltration? Discover the differences between reverse osmosis and ultrafiltration .
What can reverse osmosis reduce?
Examples of substances and impurities
Depending on the membrane used, the quality of the feed water and the operating conditions, reverse osmosis can help reduce many substances present in water.
Heavy metals Lead Mercury Nitrates Pesticides Dissolved salts Chlorine Fluorides Pharmaceutical residues Micropollutants PFAS
