I have recently purchased an older home, which i am now living in. The water flow to the upstairs bathroom is slow and low pressure from years of hard water build up. Because of the way the plumbing has been run it would be thousands of dollars and the removal of a floor and a couple walls to rerun the piping. Is there any way to clean the hard water deposits from the pipes with out spending all that money and replacing them? I didnt know if vinegar water or some other form of solvent might work. Thanks for the help.