Replaced 12-yr-old tank in Acworth home today. Customer experiencing luke-warm showers + rust-colored water. New unit = Rheem Performance Platinum 40 gal w/ 12-yr warranty. Had to modify supply lines + upgrade to larger drain pan. Added thermal expansion tank per code. Properly strapped + secured for earthquake safety. Adjusted temp setting to 120°F for safety + efficiency. Old unit hauled away for recycling. Customer super pleased w/ professional installation + hot water!!!