A device designed to prevent backflow contamination in plumbing systems, particularly those connected to irrigation setups or hose bibs, utilizes a specific component to maintain its functionality. This component, frequently offered as a bundled set, allows for the replacement of worn or damaged internal parts. The size designation refers to the diameter of the pipe fitting the device accommodates, typically measured in inches. An example is a residential sprinkler system requiring a replacement for its anti-siphon valve internals.
Proper functioning of these assemblies is vital for safeguarding potable water supplies from pollutants. Regular maintenance and timely replacement of deteriorated parts ensure continued compliance with plumbing codes and regulations. The historical context of these preventative devices underscores their evolution in response to growing concerns about water safety and public health.