A hot tub heater won't run without the pump. Which gate decides? ♨️ #Shorts - Video

A hot tub heater won't run without the pump. Which gate decides?

A hot tub heater follows two rules. The water is cold, but with no flow it stays off. The pump starts and water flows past, so it heats. The pump stops, heater off instantly. With no moving water the heater would cook itself dry. It is an AND gate with a flow switch.

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