WODARO SLIM 1400 Reverse Osmosis Water Filter Under Sink for Kitchen TDS METER

Modern reverse osmosis for the kitchen without a tank

WODARO SLIM 1400 is a tankless reverse osmosis filter for under-sink installation, designed to save space and make daily water dispensing convenient. Its slim design, about 10.6 cm wide, makes it easy to organize space in a kitchen cabinet, and the lack of a tank means more room and freshly filtered water on demand.

The unit achieves a clean water flow of about 1.2 L/min, which translates into a maximum daily output of up to 1728 liters. This is a parameter that clearly improves user comfort compared with many traditional RO systems with lower flow rates.

An additional advantage is the clear touch LED panel showing the TDS of the incoming and outgoing water. This allows the user to monitor water quality and the filtration system’s performance in real time.

Main advantages

• High flow: 1.2 L/min – convenient dispensing without long waiting.
• Tankless – fresh water and more free space in the cabinet.
• Slim housing – only 10.6 cm wide.
• Removes up to 99.98% of contaminants – chlorine, fluoride, lead, bacteria, viruses, heavy metals, organic compounds, sediment, rust, odor, color, and other undesirable components.
• NSF-certified membrane – filtration precision of 0.0001 µm.
• Water waste ratio 1:1 – low wastewater volume, greater savings, and more eco-friendly operation.
• TDS display – measurement of incoming and outgoing water quality.
• Smart automation – cartridge life counter, replacement reminder, automatic flushing, automatic water shut-off, and water shortage sensor.
• Quick cartridge replacement – service in a few seconds, with automatic water shut-off.
• Built-in pump – supports operation even at very low pressure.
• Extended warranty – the unit can be installed and serviced by the user without affecting the warranty.

What makes this reverse osmosis filter stand out?

WODARO SLIM is among the most advanced solutions in the high-flow 400G class. It combines a tankless design, low wastewater ratio 1:1, TDS IN/OUT monitoring, and an integrated system with a limited number of connections.

Compared with traditional under-sink systems that often have a tank, many hoses, lower flow in the range of 0.2–0.4 L/min, and higher water waste at 1:3 or 1:8, this system is more compact, easier to use, and better suited to modern kitchens.

Set contents

1. Main unit – WODARO SLIM Reverse Osmosis
2. Set of 4 starter cartridges
3. Power adapter 220/110 V → 24 V / 4 A
4. User manual in Polish
5. All necessary accessories for connection

Filter cartridges and replacement schedule

1. WODARO PP pre-filter

Responsible for retaining large particles, sediment, rust, and other mechanical impurities.

Recommended replacement: approximately every 3–6 months or according to the reminder shown on the panel.

2. WODARO CTO carbon block

Reduces organic compounds, odor, aftertaste, residual chlorine, and water color.

Recommended replacement: approximately every 6–12 months or according to the system reminder.

3. WODARO 400 GPD osmotic membrane

The key element of the reverse osmosis system. The osmotic membrane uses automatic flushing, which helps clean its surface and extend service life. The filtration precision stated in the description is 0.00001 um, and an NSF certificate is also indicated.

The membrane removes bacteria, viruses, heavy metals, dissolved substances, and salinity.

Recommended replacement: usually every 24–36 months, depending on water quality and TDS level.

4. WODARO T33 post-filter

Responsible for the final improvement of water taste and clarity and reduces any remaining odor.

Recommended replacement: 6–12 months or according to the reminder.

System functions and operation

Real-time TDS meter

The panel shows the incoming and outgoing water TDS, for example 354 ppm → 11 ppm. This allows you to monitor filtration efficiency, observe water quality, and assess cartridge condition in real time.

Touch LED panel

The touch panel allows you to control the unit and quickly read its status. It includes POWER, FLUSH, RESET buttons, selection of the active cartridge (PP / CTO / RO / T33), and a WATER LACK indicator informing about water shortage. This solution simplifies daily operation and servicing.

Cartridge replacement reminders

The screen shows the purification status and the life bars of individual cartridges. The system signals the right time for replacement, helping maintain high filtration quality.

Auto-Flush – automatic flushing

This function activates cyclically and after the unit finishes operating. Flushing the RO membrane helps improve water taste and extend the life of filtration elements.

Waste-to-clean-water ratio 1:1

Advanced hydraulics and a pump make it possible to achieve a low wastewater ratio of 1:1, which means lower water consumption and lower bills during everyday use.

Modern integrated design

The device has a reduced number of internal tubes and fittings. Fewer connections mean a lower risk of leaks and a more compact design.

Fast-Change quick cartridge replacement

The cartridges can be removed and installed in a few seconds. The system automatically shuts off water both at the cartridge and at the base, increasing convenience and service safety.

Applications and everyday benefits

This water filter is ideal anywhere quick access to clean water is needed for drinking, cooking, coffee, tea, and daily kitchen use. Effective reduction of TDS, chlorine, odor, aftertaste, and many other contaminants translates into better-tasting beverages and less limescale buildup.

The tankless design and slim format make installation easier in small and modern kitchen cabinets. The unit can be positioned to maintain convenient service access and simple hose routing.

Additional important information

• For municipal water — ideal. For well water as well, but with high turbidity/iron we recommend pre-filtration, and in case of microbiological risk — a UV lamp. If in doubt, we will advise on the configuration.

Technical specifications

FAQ