As I’ve mentioned previously, household instrumentation is addictive. Further, it can draw out my compulsive tendencies. I’ve been wanting to add a smart water flow meter to our home for a while. This was motivated by the fact that we have gardens, and we occasionally forget the water is on. On such occasions the result is a soggy, boggy part of the yard and an unwelcome spike in the water bill.
A False Start
Last year, I tried an initial experiment using the Orbit B-Hyve Smart Hose Faucet timer. This device would only control one faucet, but under $60, it was cheap. I thought it a good experiment. The trouble is I could not get it to work for me. I was never able to get its little hub to connect to the device.
As a result, I returned it and began to investigate devices that would meter flow in the main water line from the city. I hoped that I could set an alert to tell me if we left the water running too long or into the evening. It would not turn off the water, just alert me that I had to do it.
Red Pill or Blue Pill?
I considered two kinds of add-on flow meters designed for DIY installation by the homeowner. One type, as embodied in the Stream Labs Smart Home Water Monitor, clamps onto the water supply line and read the flow using an ultrasonic beam sent through the pipe. They work with copper or plastic pipe. At our home the main water supply line from the city is plastic, so this could work for us.
However, I settled on the simpler approach used by the Flume water flow meter. It has a sensor device that clamps onto the city water meter. This senses the motion of a magnet on the rotating mechanism inside the city meter.