RO 2500 System

A typical reverse osmosis (RO) filter system setup. The D&S RO 2500 System is shown here.

The water-cleaning system is an important part of a car wash operation. That’s why periodic cleaning of the reverse osmosis (RO) filter is a must for the continued and reliable operation of your car wash.

Reverse osmosis membranes can become contaminated with pollutants such as colloids, biofilms, and biological matter. These contaminants can absorb to the membrane surface and the pipes of the membrane system, decreasing your car wash system’s performance or even causing damage.

To clean the RO filter’s membranes, be sure to follow these steps.

Replace the filter every:

  • 6 months or
  • 100 hours of operation or
  • Upon reduced flow

Clean the membrane every:

  • 6 months or
  • 100 hours of operation or
  • Upon reduced flow or
  • If the TDS monitor reads 50 or higher

In both maintenance steps mentioned above, the hours of operation are the most critical. However, if the time frame exceeds the hours of operation, it is highly recommended that this cleaning procedure/process be followed.

Cleaning the Membranes

  1. Purchase the organic and non-organic cleaning solutions from your D&S Authorized Distributor.
  2. Turn OFF and DISCONNECT the supply water from the RO filter.
  3. Mix the solution in a container of appropriate size and dilute to the recommendations on the cleaning solution container.
  4. Remove the product hose from the storage tank and place it in the mixed cleaner solution container.
  5. Run the drain hose (concentrate water) from the RO unit into the mixed cleaner solution container.
  6. Bypass the low water pressure switch.
  7. Connect short hose to the supply water inlet on the RO unit.
  8. Place the hose into the container of cleaning solution.
  9. Run the cleaner through the membranes following the recommended running and rest durations.
  10. Disconnect the short hose and remove from the cleaning solution container.
  11. Connect the supply water hose to the RO unit supply water inlet on the unit.
  12. Turn on the machine and allow it to run for 15 minutes.
  13. Turn off the machine and allow to sit for 20 minutes.
  14. Turn on the machine and allow it to run for 15 minutes.
  15. Turn off the machine and allow it to sit for 20 minutes.
  16. Connect the main water supply hose to the RO unit and run the product and concentrate hoses to the drain; allow the unit to run for 20-30 minutes.
  17. Run the second cleaner through the membranes following the instructions from Steps 1-16.
  18. After completing Step 16 using the second cleaning solution, place the product water hose back into the storage tank.
  19. Replace the RO filter.
  20. Test the TDS level and check the flow rates and pressures.