Ace Pelizon Plumbing was called out on a urinal clogged. Ace Pelizon Plumbing found mens urinal clogged and holding urine. Heavy build up of urine crystals. Recommend cable and Descaler solution. Customer chose cable only recommendation. Tech found that flush valve has a .125 Gpm flush with very low volume flow. Recommended rebuild of valve with 1 gpm flush to offset heavy urine build up. Cabled and cleared drain. Rebuilt existing Sloan flush valve and restored water to urinal, tested for proper function. Cleaned area of water and work material