What must UG piping be prior to connection to downstream fire protection system piping?

The requirement for underground (UG) piping to be flushed prior to connection to downstream fire protection system piping is crucial to ensure the integrity and functionality of the fire protection system. Flushing removes debris, sediment, and any contaminants that may have accumulated in the piping during installation or due to environmental exposure. This process helps ensure that the water supply is clean and capable of effectively delivering water during an emergency situation.

In the context of fire protection systems, allowing dirty or contaminated water to enter could hinder the performance of the system, potentially leading to failures during critical moments. Additionally, by ensuring that the piping is properly flushed, you comply with safety standards and best practices that promote the efficiency and reliability of the fire protection system. This step is essential in maintaining the system’s performance over time and ensuring compliance with NFPA guidelines.