Hercules PT BIO1 from Oatey is an enzyme-based concentrated liquid for maintaining healthy drain systems. The fast-acting grease and waste-digesting bacteria, together with the biodegradable grease and soil removers, eliminates drainline buildup and controls odors in grease traps and sewer lines. It breaks down fats, oils, grease, and other waste-stream organics from cesspools, septic tanks and drainfields. It is safe for use in all types of drainage plumbing, and contains no acids, caustics, solvents or other harsh or harmful ingredients. It is USDA authorized for use in food processing plants, and available in quart, gallon and 5-gallon pails and 15-gallon drums. 800/321-9532; www.oatey.com.