ZEP Drain Care Build Up Remover Powder helps prevent clogs in sinks, toilets and showers. The enzyme based drain cleaner breaks clogs by cleaning and removing build-up. Using this drain cleaner monthly helps maintain home pipes and prevent clogs before they happen. The certified, biodegradable formula breaks down into carbon dioxide, minerals and water. Directions: For ZEP Drain Care to work properly, you need to establish a partial flow so the enzymes can reach further down the pipes and start the cleaning process. Lift the drain stoppers and remove hair to allow Drain Care to reach as far as possible. 1: Run warm water into the drain before treatment. 2: Mix 1 scoop in 1 pint of warm water. 3: Pour the mixture into the drain, and do not use for 6 hours. Treat for 3 consecutive days. Repeat treatment as necessary. Directions for use in toilets: Pour mixture in and flush once. Do not use for 6 hours. Treat for 3 days in a row. Directions for use in garbage disposals: Pour mixture into running disposal. Quickly turn off disposal and allow to sit overnight. Repeat as needed. Use once a month to keep drains clean. ZEP Drain Care is safe and beneficial for all plumbing and septic systems. Size: 3.66 In.