DrainClean-Harris. Harris Natural Enzyme Drain Cleaner & Clog Remover, 40 Treatments Harris Natural Enzyme Drain Cleaner & Clog Remover, 40 Treatments. 40 Treatments ? With 18 oz providing up to 40 treatments, Harris Natural Drain Cleaner is an excellent value. Removes Years of Buildup ? Natural enzymes go to work to remove buildup and foul odors, making slow drains fast again. Safe for All Plumbing ? No harsh chemicals used! Enzymes digest buildup without causing harm. Safe for all plumbing including PVC, brass, copper, chrome, and gold plated fixtures. Environmentally Friendly ? The biodegradable blend is safe for residential, commercial and industrial applications and won't harm the environment Prevents Future Clogs ? Treat drains once a month to remove buildup and help to prevent slow or clogged drains. Harris drain cleaner uses enzymes to remove years of build up. The product also helps to prevent future clogs and includes up to 40 treatments. It?s safe for all plumbing including PVC, brass, copper, chrome and gold-plated frames. Price: 1 to 2     $9.99 Each 3 or more     $8.99 Each Unit: Each Quantity: