We have two options at our residents: buy city water for $16/kgal, or use well water. City inspector estimates a consumption of 40-45kgal for irrigation per month (hot TX sun). The well yields 5 GPM, the zones measure 15-30 GPM.
One solution would be to pump into a buffer 500 gal tank, and then run a single zone, then wait until the tank is full again, and run the next. There are 24 zones.
These are options:
a) A sensor input that tells the controller to wait until the tank is full before to start the next zone. Only run one zone, then check for “full”.
b) A timer, that has a hold-down of one hour in-between zone calls.
c) A sensor that reports fill-level to the controller and calculates zones calls appropriately.
d) Keeping track of fill-level via flow sensor. Not as precise, needs an error margin.
We can theoretically water 24/7. However, it is advisable to leave the hottest portion out of the day. Hence, we may water a few zones one day and another the next. The complexity is of course also the weather. If it is raining, we skip that zone, or future zones, and how much watering do we make up for.
Which options sound feasible with Rachio?