How often must the internal parts of a reduced pressure zone backflow preventer be replaced?

The internal parts of a reduced pressure zone (RPZ) backflow preventer are designed to protect the water supply by preventing backflow caused by pressure changes. Regular maintenance is crucial for ensuring that these devices function properly over time.

The requirement to replace the internal parts every 5 years aligns with industry best practices and regulatory standards for maintaining effective backflow prevention devices. This timeframe accounts for wear and tear on components such as the check valves and relief valves, which can degrade over time due to factors like sediment buildup, corrosion, or changes in water quality.

While more frequent replacements may be considered for environments with high levels of contaminants or significant pressure fluctuations, the 5-year standard is generally sufficient to maintain optimal performance in typical conditions. This ensures that the backflow preventer continues to protect the potable water supply effectively and complies with safety regulations.