How about water injection into the salt tank after backwashing? Is the restrictor washer not installed?
When two units are connected in parallel with two water outlet pipes, one is running and the other is backwashing
The running equipment reaches the top of the backwash valve, resulting in salt box flooding.Solution: a one-way valve is installed on the water outlet pipe.
F74A3 has this problem when designing, and it doesn't matter with the current limiting washer.1, when the control valve outlet pipe is higher than the valve head, the backwash will salt box water injection.
