Product information
Ecosoft CROSS Solo direct flow reverse osmosis filter is an ultra-compact and efficient water purification system designed for small kitchens, studios, and other limited spaces. With a direct flow rate of 1.3 L/min (78 L/h) and no storage tank, it delivers fresh water instantly. A 2-stage filtration process removes up to 99.8% of PFAS, chlorine, heavy metals, and bacteria, ensuring safe and clean drinking water every day.
The all-in-one cartridge enables tool-free replacement in under 5 minutes, while smart LED and audible alerts signal when maintenance is required. Built-in automatic flushing, leak protection, and auto shut-off after 30 minutes safeguard performance and extend system life. With a 50% recovery rate, it optimizes purified output while reducing water waste. The CROSS Solo is the smallest in its class, offering powerful filtration, intelligent control, and convenience in a sleek, space-saving design.
Technical information
Cartridge Replacement Frequency
- Membrane element & carbon filter for CROSS Solo : Replace every 12 months.
Replacing the cartridges is quick and straightforward, requiring only a simple twist-and-lock mechanism. The filter automatically shuts off the water flow when the cartridge is removed, ensuring a clean and dry replacement process. Thanks to this design, cartridge replacement takes less than 5 minutes and requires no tools.
For an easy cartridge replacement, check our video guide.
The CROSS Solo features automatic membrane flushing to prevent contamination and extend membrane lifespan. Additionally, an automatic shut-off function activates after 30 minutes of continuous operation, ensuring resource conservation and system stability.
This system is designed for use with high-quality tap water free of chlorine and turbidity.
How to improve morning water quality and enjoy great-tasting water anytime
To solve this issue and enhance your drinking water, we recommend installing the
Ecosoft Mineralizing Postfilter for RO systems (PD2010ECO).
Connect the postfilter between the “Drink” outlet of your reverse osmosis system and the purified water faucet, as shown in the diagram.

This solution is ideal for compact reverse osmosis filters, where purified water may slightly lose freshness overnight due to natural diffusion.
Thanks to its mixture of calcite and activated coconut shell carbon, this postfilter provides:
- Post-filtration after the RO system
- Additional mineralization of purified water
- Improved taste and odor
Enjoy water that’s not only pure thanks to your ultra-compact reverse osmosis filter CROSS Solo, but also naturally refreshing and enriched with essential minerals.
Cartridge Replacement Notification
CROSS Solo is equipped with a smart indicator system that alerts you when a filter cartridge has reached the end of its service life:
- The power indicator will start blinking.
- All filter indicators will remain solid.
- An audible alert will also sound:
- 10 beeps every hour
- 10 beeps each time you open the tap for water purification
These visual and audible signals indicate that it's time to replace the cartridges.
After Cartridge Replacement
After installing the new cartridges, press and hold the "Restart" button for 5 seconds to reset the filter status. You will hear a single beep, confirming that the reset was successful and the system is ready for use.
Important usage tip: We recommend discarding the first two glasses of water in the morning or using them to water plants. Due to natural diffusion during overnight downtime, the quality of the purified water may slightly deteriorate.
FAQ
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Can I install this filter on inlet water containing turbidity and chlorine?
Yes, but you must install a CTO carbon filter or a combination of polypropylene and carbon filters before the system. This protects the membrane and ensures proper operation.
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How will I know when it’s time to replace the cartridge?
The system will notify you with:
- A blinking power indicator
- Solid filter status indicators
- Audible alerts:
- 10 beeps every hour
- 10 beeps each time you open the tap for purification
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What should I do after replacing the cartridge?
Press and hold the “Restart” button for 5 seconds.
A single beep will confirm that the reset is complete and the filter is ready for use.
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Why is it recommended to discard the first two glasses of water in the morning?
During periods of non-use, such as overnight, natural diffusion can slightly reduce water purity inside the system.
To ensure optimal quality, we recommend discarding the first two glasses or using them for non-drinking purposes like watering plants.
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What is basic automatic flushing?
Basic automatic flushing uses tap water to rinse the membrane.
hile it helps maintain system hygiene, we recommend discarding the first two glasses in the morning to ensure the highest water quality after periods of non-use.
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Will there be enough pressure if the RO filter is not installed under the sink?
For stable operation, the system requires water supply pressure of at least 3 bar. If the RO filter is installed in another room, such as a pantry, basement, or technical room, the distance and lifting height may slightly reduce the pressure.
If the inlet pressure is below 3 bar or the water needs to be supplied to a second floor, choose a model with a pump or install a pump separately. For a comfortable flow rate from the faucet, place the storage tank as close to the faucet as possible.
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Can the RO filter be connected to a custom or non-standard faucet?
Yes. Most modern designer 3-in-1 faucets with hot, cold, and filtered water connections are compatible with standard reverse osmosis systems.
The RO system uses a standard 1/4″ tube connection. Many designer faucets already include an adaptor for a standard RO tube. If the adaptor is not included with the faucet, a standard fitting adaptor can be used, for example John Guest 1/4″ to 1/2″ or 3/8″ thread.
Make sure the faucet is designed specifically for drinking water and has a separate internal channel and outlet. This prevents purified water from mixing with tap water.
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What is the power cable length?
The standard power adaptor cable length for systems with a pump is 1.0–1.1 m.
If the socket is located farther from the installation point, we recommend planning a nearby power socket in advance or using a high-quality extension cable.
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What is the noise level of filters with a pump?
The booster pump usually operates within a noise range of 40–50 dB. This is comparable to a quiet conversation or a modern low-noise refrigerator.
Most noise does not come from the motor itself, but from vibration if the pump touches cabinet walls or rigid pipes. Using rubber dampers or anti-vibration feet can significantly reduce this noise.
Amazing product! Incredible how little space it needs under the sink! Water tastes great
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