Thanks for tagging me @JDRoberts . All I can really think of would involve devices that are large compared to these watering solutions. A zigbee/zwave valve could be used to act as a drain when opened, but these are not small devices and the end solution would look pretty bulky IMHO. I suppose an actuator could be used along with a device like the MHCOZY 1 Channel 5V 12V ZigBee Smart Relay Switch or FortrezZ’s Mimolite.
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