Wellness AquaGlo Plus N1581 Owner's Manual page 19

*Note for Version 4 AquaGlo PN's 408101-V4, 409101-V4
c. Follow the tubing from the valve to the solenoids, ensuring there is fluid
on both sides of the solenoids. If there is fluid on one side of the
solenoid but not the other. The solenoid is bad and must be replaced.
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