Old or new, they all suck. Last one I did was for kitchen sink. Not very old. Should have needed a couple orings, or at worst a drop in cartridge. Body was corroded. Parts I would have needed not available. Scrap and replace. At least with the old ones all parts are replaceable if body not damaged. This is original from 1980 What sucks is I think I tossed the valves from upstairs shower that were not that old and probably same.