what is drain

A drain is a plumbing fixture that serves as a primary vessel or conduit for unwanted water or waste liquids to flow away, either to a more useful area, funnelled into a receptacle, or run into sewers or stormwater mains as waste discharge to be released or processed). Drains are designed, installed, and maintained to ensure their functionality for their intended purpose, allowing for variances in volume, matter to be conveyed, and maintenance requirements). Blocked drains are a common problem in bathrooms and kitchens, and they can be cleared using a chemical drain cleaner, a drain snake, or by disassembling drain pipes). In addition to its plumbing definition, "drain" can also be used as a verb to mean to draw off liquid gradually or completely, to cause the gradual disappearance of something, or to exhaust physically or emotionally.