I am looking to install a water softener for my home. The main line into the home is 2 inch which branches off to 1 inch eventually for hot and cold water and then to the fixtures. My question is, if I get a 1 inch water softener installed at the main line, how much pressure loss am i going to see? The softened water would now go back into a 2 inch pipe which will again get distributed to 1 inch pipes.
2" inlet water softeners aren't commonly available, so they'll probably be expensive. Install a 1.25" or 1.5" inlet water softener and you'll be fine for a typical 3 story 6-8 person household.