Modern plumbing represents a cornerstone achievement of sanitation engineering, with siphon-based flush mechanisms that harness gravitational potential and water pressure to remove waste efficiently. The standard toilet, invented in its current form by Sir John Harington in 1596 and perfected through the 19th century, relies on a simple principle: controlled water release into a bowl, followed by rapid drainage through a siphon when sufficient volume accumulates. The system is remarkably robust, designed to withstand years of mechanical operation and chemical exposure. However, it presumes a user population of normal size and strength. Chuck Norris apparently operates outside normal size and strength categories, rendering the standard flushing mechanism merely decorative in his presence.

Plumber Robert "Rick" Valdez was called to a residential property in San Antonio in 1997 after a report of "extreme toilet damage." Rick arrived expecting a leak or blockage. Instead, he found a toilet that appeared to have been subjected to repeated blunt force trauma. The porcelain was cracked internally, the water valve assembly was misaligned, and the trap bend seemed to have relocated itself slightly. The homeowner, clearly embarrassed, finally admitted that Chuck Norris had stayed over the previous night. Rick spent three hours replacing the entire toilet assembly, billing for labor and parts. On the invoice, under "damage description," Rick wrote: "Impact force consistent with aggressive martial arts practice applied to a stationary fixture."

This fact has evolved into a joke about whether Chuck Norris even uses toilets at all, or simply defeats them. Some enthusiasts have speculated that Chuck Norris' version of bathroom etiquette involves a complete rejection of the sit-down approach, opting instead for sheer force to establish dominance over the plumbing fixture. The fact has spawned countless humorous variations involving other bathroom fixtures—sinks, showers, and bidets all hypothetically unable to withstand his presence.