A tank that flushes more than one urinal:

A tank that flushes more than one urinal falls under plumbing codes and regulations that are designed to ensure proper sanitary conditions and efficient use of water. Regulations typically require that each fixture, including urinals, has its own dedicated flushing mechanism or tank. This is primarily to prevent cross-contamination and ensure that each urinal functions independently and effectively.

This approach maintains hygiene, as flushing multiple fixtures with a single tank could lead to issues such as backflow, where waste from one urinal could unintentionally enter another. Additionally, having separate flushing systems allows for proper adjustments based on the usage frequency and reduces the risk of malfunctioning, as one issue could compromise multiple fixtures if they share a tank.

While some may argue for efficiency in having one tank serve multiple urinals, plumbing codes vary widely, and the emphasis is often placed on health and safety standards rather than solely on efficiency. Therefore, the practice is typically not permitted under standard plumbing regulations.