I’ve changed three older 3-handle, 8″ wide brass shower valves in the last couple weeks, and wonder if the inlet fittings on the older valves are the same as the new ones (sometimes it’s a real trick to get the old ones off). Using new Delta valves, some seem to fit hand tight, but I’m not sure enough to tighten them up and risk the threads, so I’ve been taking the old ones off completely, and putting on the new fittings. Is this necessary, would the old ones connect properly to the new valves?
thx – Jim