Applied epoxy coating to interior of residential water pipes in Northbrook. System comprised of aging copper pipes showing signs of corrosion. Thoroughly cleaned all pipes using air scouring technique. Dried system completely before application. Applied two-part food-grade epoxy coating throughout entire system (approximately 210 linear feet). Performed pressure test post-curing - holding at 85 PSI with no drops. Water quality testing shows significant improvement. 5-year warranty provided on coating integrity.