*Big sigh* well I had my second experience with water outside the tank.
I was tired of manually topping off the tank every day so
@Vhuang168 let me borrow one of his spare ato's. I set it up and watched it fill to its limit then heard the pump shut off so I left it. A couple hours later I saw a stream of water in my garage coming from the wall where the tank is. I immediately thought of the ato and unplugged it even though I didn't hear the pump running. Then I got a bunch of towels.
I still was trying to determine how this happened. It's a tunze ato with both an optical sensor and a secondary float switch. Here it is fully submerged with the float switch up.
It occurred to me that my reservoirs are higher than my sump so gravity allowed it to continue to flow after the pump turned off. Once I came to this realization I promptly pulled the tube out of the sump and watched it flow freely on my garage floor. So I lifted it up above and secured it to stop it.
I had just filled up my barrels last night and checked now to see that it was about 1/2 full. This means there was about 25-30 gallons of water that had flowed into my sump. There's probably about 5-10 gallons of available volume in the sump before it overflows so that means there's about 20-25 gallons of water on my living room floor.
I soaked up as much as I could with towels and even used my vacuum on it, which did a good job of pulling moisture to the surface of the carpet where my fans are blowing across it.