I believe the washers are worn out on my shower stems. I bought a tub wrench to remove the stem and it will not budge. About a month ago a plumber buddy of mine came over and removed it very easily and put it back because he did not have the correct washer. Now that I do, and have a wrench, I am thinking how hard could this be. He even mentioned that you do not have to tighten them much. I can not get it to turn. I think it is a price/pfister. Are these standard threaded,,, or do they loosen to the right? Please help.