For now if you are good at DIY you can always attach a relay to the same output that powers the flush solenoid and connect the switch side of the relay to a sense port input and set that up as a float switch. The use that input to trigger an output when that input turns off and set a maximum on time of how long you want the output on after the regular flush valve is turned off. The set run past max on time to off. Also make sure and not set an alert for this so it would alert you every time it is turned off. When the flush valve turns back on it will reset the output since the input controlling it switches to the state that will turn it off. That is the only thing I could come up with. I do have an output setup similarly to turn on my actual RODI output since I have two separate containers that it auto fills and also a timer to turn it on to refill the bladder tank for the ice maker. There is a combiner output that powers the relay and the relay output is setup as a float switch input and used for both the turn on input and turn off input on the RODI output so if either solenoid for the fill of either containers comes on it also turns on the RODI output. Also the timer output will also turn it on but then no specific solenoid on the output is turned on but it allows the bladder tank to refill if it was used to refill the ice maker.