My husband has been trying to remove the 4-valve diverter in the shower and it will not budge. Our home is aproximatley 30 years old. It looks like the pipe connecting to the converter is copper. We have sprayed w-d 40 and have given it plenty of time to work. However we CAN NOT get it off. Do you have any suggestions what we need to do before we call a plumber to get if off?
Thank you for your help. ::o
