What is the minimum length of a removable airline on a system protecting a freezer?

What is the minimum length of a removable airline on a system protecting a freezer?

• A. 4 feet
• B. 5 feet
• C. 6 feet
• D. 8 feet

Answer: (B)

In a freezer-protected water-based system, the removable airline is used to purge air from the lines and allow the system to be filled or tested without trapping air pockets. Requiring a minimum of five feet ensures the purge line can reach a convenient, accessible testing/drain location and be positioned away from the freezer’s interior where ice or frost could interfere. This length provides enough reach to complete a proper purge and valve testing while keeping the line clear of obstructions and damage in cold environments. Shorter lines, like four feet, wouldn’t reliably reach the needed point for purging, while longer lines aren’t necessary to meet the minimum requirement. Therefore, the minimum length is five feet.

In a freezer-protected water-based system, the removable airline is used to purge air from the lines and allow the system to be filled or tested without trapping air pockets. Requiring a minimum of five feet ensures the purge line can reach a convenient, accessible testing/drain location and be positioned away from the freezer’s interior where ice or frost could interfere. This length provides enough reach to complete a proper purge and valve testing while keeping the line clear of obstructions and damage in cold environments. Shorter lines, like four feet, wouldn’t reliably reach the needed point for purging, while longer lines aren’t necessary to meet the minimum requirement. Therefore, the minimum length is five feet.