Installation of Auto Shutoff Valve:

The Auto Shutoff valve has 4 connections as follows:
-The side with the marking (IN) is connected to filter #3
-The side with the marking (OUT) is connected to the input of the membrane cap stage #4
-The side with no marking with screws, it’s called the screw side of the “in” is connected to the check valve
-The screw side of the out is connected to the tee fitting of stage#5 inline carbon filter