RO Water Controller

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Make RO Water production more convenient with Tunze's automated RO Water Controller!


The Tunze RO Water Controller 8555 is used to regulate the water level in your fresh water storage container. It uses two float switches to control an electronic valve. When the water level drops below the first float switch, the valve is opened allowing the container to fill until it reaches the second float switch and the valve turns off. The Tunze RO Water Controller 8555 also features a timer backup that can be set to either 12 or 24 hours. If the float switch hasn’t been triggered off within the set time the valve will close and an alarm will be activated.


What's Included?

  • Tunze RO Water Controller 8555.000
  • Solenoid Valve
  • Power Supply
  • Float Switch Brackets & Mounting Hardware






pdf Owners Manual

More Information
UPC 4025167855511
Max Tank Thickness 3/4 in.
Included Mounting Hang On/Bracket
Pump Included No
Water Level Detection Float Valve or Switch
Alarms Visual
Safety Features Overflow Timer
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Product Questions

Does this work with systems that use a booster pump?
Question by: Slew on Nov 15, 2022, 3:10 PM
Hey there,
Thank you for reaching out to us. Yes, this will work with a booster pump.

Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Nov 22, 2022, 1:01 PM
What is the default position of the value if the power is cut (i.e., during a power outage)?
Question by: Myron Roth on Mar 21, 2016, 2:25 PM
Great question!
The default position of the solenoid is closed to prevent issues. Feel free to let us know if you have any further questions!
Answer by: Connor on Mar 22, 2016, 11:05 AM