I plugged it into a socket and it has been working really well since I've had it. What I couldn't find in the manual is how to connect it to the pump I had. You mount the float on the pressure pipe, plug in the watchdog connector and then connect the pump to it. Then ensure that the float switch on the pump is left in the on position. It works very well and works within 10 seconds after it speaks. I also recommend using this with a check valve. It's really easy to install with a simple flat head screwdriver.
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