Quote Originally Posted by MiddleAgeSoftie View Post
The pipe diameter I was referring to is the copper water pipes going from the house into the softener and from the softener back into the house rather than the distributor pipe going from the valve to the bottom of the tank (although that may also be 3/4").
Looks like I was on the wrong page... my bad...

But yes looking at the photos and the brass yoke that is in use looks more like 3/4" which would mean that the copper feed and return line or untreated and treated water is 3/4"....