Absolutely correct, there is a small solenoid valve that turns on the water. Ice makers also have a small heater that loosens the ice cubes so that they fall out easily.
No sewer pump… all gravity. Water softener is a possibility, but seems unlikely. Hopefully I can narrow down the list of candidates this weekend through process of elimination.
I’m on my third water softener, and none of them have used pumps…all used water supply pressure (and siphoning the salt) to re-charge the softener beads. Only electric use is the timer and solenoids…pennies per year.
I’d think if we could isolate the graph to each device we could easily identify the units that are on or off.
Appears like it could possibly be a hearing Element or a battery charger for a boat.
I say boat charging because leaving one that has higher amperage on automatic will cause it to cycle on every few seconds.
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