An RO flow restrictor (sometimes referred to as a flow restriction switch) is a critical component in a reverse osmosis (RO) water purifier. It regulates the flow of wastewater (brine) leaving the RO membrane, maintaining the necessary pressure inside the membrane housing for efficient filtration.

It is not a switch in the traditional sense but works passively to control water flow.

Purpose of an RO Flow Restrictor:

1. Pressure Regulation:
   • Ensures sufficient back pressure within the RO membrane housing to allow proper filtration. Without it, water would flow too quickly, reducing filtration efficiency.
2. Wastewater Control:
   • Limits the amount of wastewater discharged, ensuring an appropriate ratio of purified water to waste.
3. Membrane Protection:
   • Prevents overloading the RO membrane by keeping water flow consistent, enhancing its longevity.

How It Works:

• Installed in the drain line connected to the RO membrane.
• Restricts the flow of wastewater leaving the system.
• Works in tandem with the pump and other components to balance the system.