What is one reason why the size of a fixture water supply pipe for a flush valve toilet is important?

The size of a fixture water supply pipe for a flush valve toilet is crucial to ensure proper flushing. A flush valve toilet relies on a specific volume of water delivered quickly to effectively evacuate waste and refill the bowl. If the supply pipe is too small, it may restrict the flow of water, leading to inadequate flushing performance. This can result in partial flushes that require multiple attempts to clear waste, contributing to annoyance and inefficiency. Sizing the pipe correctly allows the toilet to function as designed, providing powerful flushes that help maintain sanitation and reduce the need for excessive water usage due to repeated flushing.