How to connect Solenoid Valve to water Level Switch?
How can I wire them so that when the level reached the valve will close and water will not flow into the tank? The switch is inside the tank and the valve connecting the pipe for feed water. Thanks
Answer:
If the valve opens when power is applied, the connection is easy. Connect one wire from the switch to the black (hot) wire of a 120 VAC power cord. Connect the other switch wire to one non-ground prong of the solenoid. Connect the white (neutral) power cord wire to the other non-ground prong of the solenoid. Connect the green (ground) wire of the power cord to the ground prong of the solenoid.
If the valve closes when power is applied, get a float switch that disconnects when the water level reaches the target.
If you can't change the switch, you need a 120 VAC relay. Wire the relay as described in paragraph 1. The relay needs to have a contact that opens when power is applied. Wire that contact to the solenoid in the manner described in paragraph 1.
When selecting your solenoid valve and level switch you should consider "normally-open" or "normally closed".
Since your valve and switch is inside the tank, why don't you just use a float-activated valve and get rid of the electrical end entirely? Why do you think they use float-valves in toilets? Because they do not consume any electricity and they are simple devices. Since you're not controlling a pump, why not just keep it simple?
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