"Punch" wrote in message
...
in our neighbourhood, we need the use of a water softener, should I be
using
this to water the grass, or flip it to bypass, and use untreated water?

Normally a water softener is needed only on the supply to the water heater.
Unless you have objectionable odors or taste in your water I would have it
connected that way.
And perhaps it is. Furthermore, despite what the softener sellers claim,
backwash salt remains in the system so you are watering with very slightly
salted water. Or drinking it.
I would use untreated water for watering.