Drainpipe™, also called Downpipe™, is a sticky, water-soluble liquid that adheres to the inside walls of drains and sinks, neutralizing odors from decomposing organic matter or sewage. To apply, pour 1 or 2 dosing caps down the drain (shower, sink, drain), followed by a couple of capfuls of water. It is an excellent cleaning supplement for hotels and tourist apartments, ideal for eliminating lingering odours after cleaning.