For antifreeze systems larger than 150 gallons, tests should be conducted at additional points for every what volume increase?

For antifreeze systems that exceed 150 gallons in volume, the testing protocol mandates that additional testing points be included for every 100-gallon increase. This is significant because antifreeze systems require careful monitoring and evaluation to ensure proper functioning and safety, particularly as the volume increases.

The rationale behind this requirement is that larger volumes of antifreeze can behave differently due to various factors, such as temperature and fluid dynamics, which can affect the system's performance. By setting the threshold at 100-gallon increments, inspectors can ensure that they are comprehensively assessing the system's functionality and reliability. This practice helps in identifying potential issues that may arise from larger volumes, leading to better maintenance and operational safety.

Understanding these testing requirements is vital for effective inspection and maintenance of sprinkler systems that utilize antifreeze solutions, as they are often needed in environments where the risk of freezing poses a threat to the integrity of fire protection systems.