I just moved into an older house that doesn't have a shower and I'm trying to replace the tub spout to add one with a personal shower attachment. For some reason I can't get the old spout of. There are no screws on the outside of the spout. I've chipped away the putty and used wd 40 but I still can't get the old spout off with a wrench. Is there something I'm missing or do I need to call a plumber. Like I said, the house is oldeer and I wouldn't be surprised if the spout has been in there for 30+ years