DIY Water Leak Alarm with Automatic Water Pump Disconnect Relay

The SHUREflo Accumulator in our Agile developed a small leak, and as usual, I forgot to switch off the water pump and it continued to cycle on and off while we were gone for a hike…luckily, it was a short hike and was immediately greeted by the blaring water leak alarm sound as soon as got into the van.

For the above reason, I decided to build a water leak alarm with automatic water pump disconnect relay. The idea is to disconnect the water pump when sensor senses water; additional wired sensors or maybe wireless sensors can be added later.

Things you need for this project (clicking on the links will take you to Amazon):
·        Rain sensor module with relay control
·        Automotive heavy duty 5-pin 40/30-amp relay
·        16 or 14- gauge wires
·        2-3 feet of smaller gauge wires for the sensor
·        12-volt Piezo Electronic Buzzer Alarm
·        Project enclosure
·        SPST switch
·        Cable gland (optional)