How many basic styles of flush valves (flushometers) are there?

The correct choice indicates that there are two basic styles of flush valves, also known as flushometers. Understanding these styles is important because they operate differently and are designed for specific applications.

The two primary types of flush valves include the diaphragm valves and the piston valves. Diaphragm valves use a flexible diaphragm to regulate the flow of water; they are often used in commercial settings due to their reliability and efficiency in managing water usage. On the other hand, piston valves utilize a piston mechanism to create a tight seal, providing robust performance ideal for high-demand situations.

Familiarity with these two styles helps in selecting the appropriate flush valve for a particular installation, ensuring optimal performance and compliance with plumbing standards. Recognizing the differences between these flush valve types enables individuals to troubleshoot issues or make informed choices during installations or repairs.