This is for a Nuvo Fusion 10. Price is not an option, I need the most reliable ATO that will NOT overflow. I have the bigger Osmolator in my main system and I love the backup float sensor that cuts off the power to the pump if it ever overfills. (Which has saved me a few times).Hard enough convincing the wife to get a second tank. This one will be in the kitchen, and there isn't much room for any ato mishaps since this tank is teeny and it'll overfill fast.