Now connect the flexible hoses from the bypass valve to your cut pipes. Tighten with your wrench—hand tight plus a quarter turn. Over-tightening cracks the fittings and causes a slow drip that will haunt your dreams.
Plug the softener’s control head into a grounded outlet. Most units are low-voltage (24 volts), so the worst shock you will get is a mild tingle and maybe some mild embarrassment.
Run a temporary hose from the softener’s drain line to your floor drain or a nearby sink. This is where the salt brine gets flushed during regeneration. It smells faintly like the ocean. Romantic.
The First Regeneration: A Baptism by Salt
Pour 40 pounds of water softener salt into the brine tank. No, that is not a typo. Forty pounds. It feels like you are feeding a very thirsty dinosaur. Add about three gallons of water to start the brine creation.
How To Install A Water Softener System at Lilly Hurdle blog
Set the timer on the control head. Most modern softeners regenerate at 2:00 AM—prime "nobody is showering" time. If you miss this step, you will wake up to a regenerating tank at 3 PM while you are on a Zoom call. Set the clock.
Manually cycle the unit through a regeneration to purge air from the system. You will hear gurgling, hissing, and possibly the sound of your own laughter at your sudden DIY prowess. Let it run for 15 minutes, then open the main water valve slowly.