It's best to put a filter in front of the softener. The filters are cheap, they will help protect the softener. Just watch your psi drop. I usually over size the filter, if it's a 3/4 line to the softener, I put a filter with 1" inlet/outlet.
A forum community dedicated to professional plumbers. Come join the discussion about the industry, safety, finishing, tools, machinery, projects, styles, scales, reviews, accessories, classifieds, and more!