My sister just replaced a water pipe leading to the house. The old one was disintegrating and the water carrying minerals through the system. The water is much cleaner now, but every plumbing repair has been a major work because of all of the mineral buildup. The faucet bib in the backyard is our next challenge. No amount of WD-40 soak has helped and we had tried some pretty big wrenches. It is up against the house so I can't just cut it off and start over.
Is there any product that will dissolve the mineral build-up?