How often should a main drain test be conducted at each water-based fire protection system riser?

A main drain test is crucial for the maintenance and reliability of water-based fire protection systems. Conducting this test annually allows technicians to ensure that the system has adequate water supply and to check for any obstructions or issues that may affect system operation.

Performing the main drain test once a year is designed to comply with industry standards and regulations, which emphasize the importance of regular assessment of system performance. This yearly basis strikes a balance between maintaining system reliability and not imposing excessive operational downtime or resource allocation.

More frequent testing, such as monthly or quarterly, may not be necessary for the main drain since it could lead to unnecessary wear on system components and increased labor costs. Similarly, while bi-annual testing is more comprehensive than only once a year, it still does not align with the widely accepted standard for ensuring proper functionality while balancing maintenance efficiency.