I feel like this problem has a simple solution, but I'm too ignorant to figure it out myself!

My system has a basic solenoid water pump (120 VAC, 60 Hz, 25 W) that draws water from a water tank. I've added a float switch (30 W, SPST) to the side of the tank that is meant to shut off power to the water pump once the water level in the tank gets low. Of course the simplest way to wire these components is to just put them in series. However, the inrush current from turning on the water pump burns up the float switch, fusing the contacts inside and causing the circuit to be permanently closed.

What is the best way to manage this inrush current and prevent the float switch from bearing more than its maximum 30 W?

 

Look up (i.e. Google) single phase motor soft startup circuit. See if any satisfies your needs.

 

Use a relay with a 120 V AC coil and a set of normally open contacts. You could also use a triac with a suitable value gate resistor.

Les.

 

I agree with Les's solutions.
That's better (and likely easier) than trying to limit the motor inrush current.

 

Thank you all so much! I've reached out to a supplier with my component's specs and they were able to refer me a specific relay to use in my application.