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[brobin]

Check this out.  It continuously monitors water flow so you can see if something is leaking.  No plumbing required.
flumewater.com

[bkenobi]

From the looks of it, the flume device is a very nice cloud based implementation of a device DIY'ers have been building for years. MySensors has a water meter reader project that uses a Hall Effect sensor identical to this that can be built for around $20USD last I checked.

Example:
https://www.mysensors.org/build/pulse_water

I've considered installing one in the past, but I'm pretty sure the range is too much for my home considering its 150' and underground.

On the other hand, why not consider an X10 solution since this is the x10 forum?

https://www.x10.com/wd13a.html

[brobin]

The X10 water sensor is fine for detecting a leak when a specific spot gets wet but won't help find a leak that's not so obvious like a running toilet or a cracked irrigation line where a small continuous flow can go undetected.  As for rolling your own as opposed to buying a finished product, that's certainly an option for those so inclined. 

[bkenobi]

I don't think you can use a whole house water meter to determine where a leak is. If you want to know if you have a leak, you can buy a device to monitor usage or you can look at your existing meter to see if its moving. If you have a leak, the small dial will be moving.

[Tuicemen]

Water leaks are not much of a concern at my off grid place. If I'm not there water is off. If a small leak occurs like a toilet running it isn't long before my non electric water softener kicks in.

However I do have other sensors in mind for the off grid place. I was given a ESP-01S a year or so ago and just started to play with it.
Since my Pi/Cm15a case is getting crowded out with exccess wiring I may move the DHT sensor to it and add a different sensor to the PI.
The  ESP-01S is only 3 volt so some sensors are just to much for it, with out a different power source.
Then again there is always the wemos board like what HG-Mini uses. I've been thinking of picking up a few of these inexpensive boards and maybe even making a HG-Mini.

[HA Dave]

Check this out.  It continuously monitors water flow so you can see if something is leaking.  No plumbing required.
flumewater.com

The video I watched... looks good.  https://www.youtube.com/watch?v=p1FRf0l3mjg And I can get this right through Amazon (delivered FREE tomorrow).

Of course.... if I was on vacation or wintering somewhere I'd still want to turn off the water heater and close the value on the water line. But for our normal busy (pronounced: distracted) day-to-day lives.... this might be perfect.

On the other hand, why not consider an X10 solution since this is the x10 forum?

https://www.x10.com/wd13a.html

I already had/have moisture/water detection (and a sump pump that never runs) as I like safety & security automation. BUT.... This is where X10 could really shine. This is maybe a little closer to deep-state automation. More likely the kind of stuff old serious automation peeps are drawn to. There is NO REASON X10 can't expand on it's cloud-based automation. I would be happy to send my money to X10 instead of flumewater.