You get side tracked enough to fill a 40 gallon tank..... WOW. That would be a mess.
Care to share your device? I would like to get as much warning as possible.
From the sounds of it, it might be a short chain to padlock your hand to the tank valve handle. Every time you try to leave, you automatically open the valve. When I'm working as the "sanitation engineer," I don't leave the UDC. I put a small shut-off valve on the inlet to the tank flush, just so I can shut off the water right there.
Yall don't feel too bad I have overflowed ours 3 times. Only once was it messy. I guess you can say I am a slow learner. Now after getting my a.. chewed out real bad I have learned to stand by the valve and not talk to anybody. If I have to talk to anyone I turn off the water first. BTW it does not take that long to overflow the black tank. Incidently the toliet bowl holds just over 2 gallons of water so 21 bowls full will fill up the tank.
about 8 minutes, & the water starts pouring down the stairs.. I guess you must not have kids .. Myself, I need to leave note to remember to get up some mornings!You get side tracked enough to fill a 40 gallon tank..... WOW. That would be a mess.