iSpring RO400 Reverse Osmosis System (Tankless, 400 GPD, White)

How much space does the RO400 require for installation?

The system measures 15cm x 20cm x 64cm and saves up to 70% space compared to traditional tank systems. It fits comfortably in most standard under-sink cupboards whilst leaving room for other storage. The tankless design eliminates the need for a separate storage tank that typically requires additional space.

What contaminants does this system remove from water?

The RO400 removes over 1,000 harmful contaminants with up to 99% efficiency. This includes chlorine, fluoride, lead (up to 98% removal), arsenic, asbestos, calcium, sodium, sediment, sand and odours. The TDS reduction rate reaches 99%, significantly improving water taste and safety compared to standard tap water.

How often do the filters need replacement?

Filter replacement frequency depends on water quality and usage. The built-in indicator monitors filter life and alerts you when replacement is needed - staying blue during normal operation, flashing red at 5% remaining life and turning solid red when replacement is required. Search for FPCT400 and MRO400EU for replacement filters.

Is professional installation required for this system?

No, the RO400 features all-in-one water line technology designed for DIY installation. The system includes clear paper instructions and video guides. Most users can complete installation themselves with basic tools. However, if you're uncomfortable with plumbing connections, professional installation is always recommended.

How efficient is the water usage compared to other RO systems?

The RO400 operates with a 2.5:1 pure-to-drain ratio, making it up to 400% more water efficient than traditional under-sink RO systems. This means for every 2.5 litres of clean water produced, only 1 litre goes to waste, significantly reducing water consumption and utility costs.

What is the Clean Mode function and how does it work?

Clean Mode activates when you press the flush button, running a 30-second cleaning cycle that flushes the reverse osmosis membrane. This removes accumulated contaminants and extends membrane life. The system may also perform automatic cleaning cycles approximately 20 minutes after use to maintain optimal performance.

How fast does the system produce filtered water?

The RO400 flows at up to 0.4 gallons per minute and can fill a standard glass in less than 8.5 seconds. This tankless system provides immediate access to filtered water without waiting for a storage tank to refill, making it convenient for daily use and cooking needs.

What power requirements does this system have?

The system requires a corded electric connection and uses approximately 85 watts during operation. It's not compatible with smart home systems but operates automatically once installed. The low power consumption makes it economical to run whilst maintaining consistent filtration performance throughout the day.