I live in a suburb of Houston, Texas, where they have stopped using chlorine to purify our water, replacing it with choramines. I've been told chloramines would damage galvanized pipes used in homes in my area. One neighbor had much of his galvanized plumbing replaced with PVC (at a cost of $7,000) to avoid damage from chloramine. Another neighbor had a water-filtering system installed to prevent that pipe damage. Another person told me a water-softener would prevent the problem. The galvanized pipes in my house are more than 30 years old and I've put clamps on a couple of corroded spots to prevent leaks. Will chloramines cause my galvanized pipes to leak and, if so, should I replace them with PVC, install a water-softener and/or a water-filtering system?