This highly specialized product is formulated to open clogged drains, and to be use as a preventive maintenance product in drains, sinks, and grease traps. This product maybe used in large municipal sewer lines. This powerful product helps eliminate backups, rodding and snaking of drain lines. RXSOL Drain Opener Heavy Duty contains a special additive that coats drain pipe surfaces to help prevent harmful corrosion. Regular use will help prevent grease build-up.