A Delcy Cistern Flush is a type of toilet flush mechanism that is used in India and some other countries. It uses a pull chain or a lever connected to the cistern above the toilet to release water into the toilet bowl to flush the waste. The Delcy Cistern Flush is considered to be an older technology and is not as common in modern toilets. It is known for its simple and durable design, and it is still used in many households and public facilities in India and other countries.