What is the minimum number of antifreeze samples recommended to be tested?

The recommendation to test a minimum of two antifreeze samples is based on the need to ensure the efficacy and reliability of the antifreeze solution in fire protection systems. By testing two samples, one can obtain a more accurate assessment of the antifreeze's concentration and performance characteristics. This dual-sampling approach helps identify any inconsistencies or potential issues that may arise with a single sample, ensuring that the antifreeze will provide adequate freeze protection and functionality in varying environmental conditions.

Additionally, testing multiple samples allows for cross-verification, enhancing the accuracy of the results. If only one sample were tested, it may not represent the entire system's antifreeze condition, as there can be variations due to mixing or stratification within the system. Therefore, the recommendation for a minimum of two samples is in line with best practices for inspection, testing, and maintenance of fire protection systems.