Many newer showers use a single-handle shower valve and a tub spout diverter, rather than a diverter valve in the wall. Getting replacement parts for the diverter in the wall may not be as easy as going to a home center, so you will likely have to make a trip to a plumbing supply store.
Original article: https://www.reviewjournal.com/life/home-and-garden/plumbing-supply-store-will-have-replacement-parts-2608600/
