What should you do after connecting the supply line to the hydrant?

After connecting the supply line to the hydrant, fully opening the hydrant is essential for several reasons. Fully opening the hydrant ensures that the maximum amount of water can flow into the supply line, which is critical for effective firefighting operations. This allows firefighters to have sufficient water pressure and volume to combat fires efficiently and effectively.

In many scenarios, particularly in firefighting, relying on a fully operational water supply is paramount. A fully opened hydrant reduces the risk of creating air pockets, which can occur if a hydrant is only partially opened. Air pockets can hinder water flow and create issues during firefighting operations. Additionally, the full opening of the hydrant ensures that it is operating at optimal capacity, which is important for maintaining consistent water pressure throughout the duration of firefighting efforts.

By ensuring that the hydrant is fully opened, firefighters can focus on their operations without having to frequently adjust water flow or manage inadequate supply issues, which could compromise their effectiveness at the scene of a fire.