Find a good spot to place the sensor wherever you'd like to check for water.

In the summer in NYC, the AC in the building housing Adafruit can release quite a bit of water from under each unit. The metal barrier around the unit is designed to keep the water from leaking out and the white pump sucks out the water that's contained. On especially humid days in the summer, the water can sometimes overflow out of this chamber faster than the pump can handle. It will be helpful to have an alert system set up the moment water starts to pool so that any water damage from a potential overflow can be prevented quickly. 

Here's a good spot to place the FunHouse. The magnetic feet that screw onto the back effectively hold the FunHouse where we'd like it.

Power

After picking a good spot for the sensor, consider where the nearest outlet is. You will likely need an extension cable to power the sensor where you're planning to place it.

Try to avoid running the cable on the ground as any leaks may cause issues with power.

Once you know far it is from the outlet to your sensor, lay the extension cable down. Use zip ties to lock the cable in place.

Once the extension cable is in place, power up the FunHouse and zip tie the USB C cable in place.

Use some tape to position the sensor so that it is just touching the floor but is upright.

Once, it's all set up and powered on, make sure to check once more that the email system is working. 

There you have it!