The line from the unit is only 1/4", so a larger bore line wouldn't really get you there any quicker. Its more convenient for the size of the float valve I had available. I will do a 30- 40 gallon/week water change. It will take a day or so to fill the bin when the valve is open. It does not need to be monitored, as the float will stop flow to salt bucket. Flow to ATO bin (left) is shut off by an auto shut off. There is an overflow fail safe under construction in case of float valve failure. The valve between buckets is to prevent backflow while salt water bucket is mixing.
I don't like to mix new salt water until about 48 hrs from use. This prevents build up of mineral goop and allows enough time for testing and tweaks. Anyway, that leaves about 5 days for it to fill. Plenty of time.
I should add that the pic is a tad deceiving. The line to the bucket on the right is just lower than the auto shutoff float in the bucket on the left. There is a sweet spot where water flows to the bucket on the right before it shuts off flow on the left via auto shutoff. Once the float in the right hand bucket shuts off, there is a very short period of time, after which, the float on the left shuts down. It took a few tries to get it just right, and I did soak the floor once during said tuning.
