Top Off Solenoid

This is a 24V solenoid valve made by ASCO. It is controlled through some clever wiring. First, an X-10 module is switched on for 30 seconds every two hours. When it is on, the power supply goes through the float vavle in the tank and then to the solenoid valve. This ensures a very regulated level in the tank, but does not risk sever overflow potenial by having it refill the tank continuously if the float switch gets jammed for some reason.

Float Valve and Refill Tube