What is the purpose of a drain valve fitted to a hot water cylinder?

The purpose of a drain valve fitted to a hot water cylinder is to allow for the draining of the cylinder. This is essential for maintenance tasks, such as flushing out sediment that can accumulate over time, which can affect the efficiency and longevity of the hot water system. By opening the drain valve, water can be easily released from the tank, making it possible to clean or make repairs without the added burden of dealing with water that remains in the cylinder. This function is vital, especially when dealing with issues such as tank corrosion or sediment build-up, which could impede the performance of the system. Therefore, a drain valve is an important feature that facilitates proper maintenance and extends the life of the hot water cylinder.