8. Turn on all pumps in the system.
After the valve cleaning, you may need to readjust the valve. Please note, the flow valve provides a very fine control of the flow rate, therefore after making each adjustment it will take a few minutes for it to stabilize at the new setting. Try to set the water level in the overflow box about 1cm below the top of the emergency downpipe.
And there you have it! the REEFER downflow valve maintenance is now completed.