NFPA Liquefied Petroleum Gas Code (NFPA 58) Practice Exam 2025 - Free LPG Code Practice Questions and Study Guide

The overpressure protection requirements for a water heater are met by utilizing an approved and listed device that is installed according to the manufacturer's instructions. This requirement ensures that any pressure that exceeds the safe operating limit of the system can be effectively managed and relieved. Such devices are specifically designed to open and release pressure when it becomes excessive, thereby preventing potential hazards such as tank rupture or explosions.

Using an approved device guarantees that it has been tested for safety and effectiveness under various conditions. Installation according to the manufacturer's instructions is crucial as it ensures the device functions as intended and maintains compliance with NFPA 58. This focus on proper installation and device certification underscores the importance of safety in gas systems, particularly in appliances that experience pressure fluctuations.

While circuit breakers, pressure gauges, and manual pressure relief options may play roles in a comprehensive safety plan, they do not serve the specific purpose of automatically providing overpressure protection in the same way a dedicated device does. Hence, an approved overpressure relief device is the most effective and compliant choice for safeguarding water heaters against overpressure scenarios.