Oh yeah, that's different, looks like a good idea. Still, though, 3.5 gallons/hour would kill me if the float switch stuck. Originally I was going to use a set of stainless steel sensors and a solenoid hooked up to my R.O. filter, which has a similar flow rate. Supposedly the sensors are more reliable than a float switch, but I never ended up using it because I bought the medical dosing pump.