A standpipe, typically a vertical pipe extending from a P-trap, serves as the drainage point for appliances like washing machines. The vertical distance between the P-trap’s bottom and the top edge of this pipe is a critical dimension for proper appliance function. For example, a correctly configured setup prevents siphoning, which could empty the washing machine’s drum during a cycle.
Correct dimensions ensure efficient drainage and prevent overflows. Historically, these guidelines have evolved to accommodate advancements in appliance technology and plumbing codes, leading to standardized measurements that minimize problems like backflow and ensure optimal performance. This dimension plays a vital role in preventing water damage and maintaining a sanitary environment.
