Leave your shower and sink drain pipes clean and smelling fresh with Pro-Kleen Waste Pipe and Tank Cleaner. It eliminates smelly odours and deeply cleans your shower and sink drain pipes. It also cleans and freshens your toilet cassette. This super-concentrated formula gets to work straight away to deeply clean waste pipes and your tank to keep them as hygienic as possible. Pack size: 5 litres. Usage: Add 100ml of solution and 5 litres of warm water to your waste tank. Allow it to soak on all surfaces. Shake the tank occasionally for the best results. Rinse thoroughly and repeat if necessary. Unsightly Black Bits Add 50ml of Intense Waste Pipe and Tank Cleaner and 2 litres of warm water to the flush tank. Allow it to soak for a few minutes before flushing completely through. Blocked Pipes Pour 50ml to 100ml of the solution down the affected pipe depending on the severity of the blockage. Leave it for a couple of hours to get to work on breaking down and clearing the blockage.