Reddit mentions: The best flow sensors

So if you want cheap you can use - http://www.ebay.com/itm/G3-8-Water-Flow-Sensor-Flowmeter-Switch-Controller-Meter-0-3-10L-min-/201402645132?hash=item2ee4887a8c:g:WQoAAOSwT6pVxD1H

I haven't tested that one yet but I plan on using it on my second tap just to verify that it works with my system.

I'm currently using this one - http://www.amazon.com/Gems-Sensors-226100-Approved-Materials/dp/B005T692BI
I got it cheaper form the kegbot store back in the day but they don't sell them there anymore. I'm sure you could shop around to find one for around $85

There is also the SwissFlow but it uses BSP threads - http://www.swissflow.com/sf800.html
I've used this in the past with an Arduino and it worked fine. I just had to add a lot of thread tape since i didn't have a BSP to NPT converter.

A lot of this info can be found on the kegbot forums.

I assume you've seen these water flow meters on Amazon? https://www.amazon.com/DIGITEN-Effect-Sensor-Flowmeter-Counter/dp/B00VKAT7EE


I thought about doing using these for the irrigation to check if it's off or not, but it's pulling water from a canal, which means weeds and whatnot would clog the wheel. So I'll have to rely on some indirect solution.

Look for a "hall effect" flow sensor to give you a measurable flow rate. Not sure what you plan to use to read the sensor, I've interfaced these with an arduino before. Something like this? https://www.amazon.com/uxcell%C2%AE-Effect-Sensor-Flowmeter-0-25-3L/dp/B01FJRA4IQ

3/4" Water Meter - Stainless Steel, Pulse Output https://www.amazon.com/dp/B00GM5DCCA/ref=cm_sw_r_cp_api_Xm4nzb7SRPH0W

Try this?

How about a flow switch ? Hook it to a pi zero and count time that it runs. Calculate amount of water a minute the pump moves, and you can see how much a day it has pumped out give or take a gallon or so.

The included charger is designed for 12V batteries. Just about any 12V SLA UPS battery should work.

Add a Water Flow Hall Sensor to monitor for failed solenoid & leaks.

Yes, check valves etc. It was a definitely a unit "death" as after 7 months, my hot tub breaker kept flipping and by process of elimination, it was the Ozone generator causing the problem. Disconnected it and no more breaker flips. Connected it again, breaker immediately flipped. Spoke to manufacturer and they said that means it's dead.

And yes, I meant flow switch (the little reed sensor that's inline with the flow). Right after that, there's a little port. Why is that wrong? it's literally in my spa hot tub manual as the point of connection?

What is that port for?

https://www.amazon.com/6560-860-Sundance-Spas-Jacuzzi-Switch/dp/B0031B6Y9G/ref=asc_df_B0031B6Y9G/?tag=hyprod-20&linkCode=df0&hvadid=167126215582&hvpos=1o2&hvnetw=g&hvrand=15249422066160976126&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9030963&hvtargid=aud-801738734305:pla-338035636044&psc=1