What is the required pitch for dry systems?

The required pitch for dry systems is crucial for ensuring that any condensed moisture can effectively drain out of the system and that there are no pockets of water that could freeze. A pitch of ½ inch per 10 feet for mains is specified in codes and standards to facilitate proper drainage and prevent issues related to water accumulation, which can lead to freezing and subsequent system failure.

In dry sprinkler systems, maintaining the correct slope in the piping is essential, as these systems are designed to remain free of water until the activation of the sprinkler heads. The specified ½ inch per 10 feet helps to ensure that the piping drains adequately without trapping water in low spots, which is an essential consideration for system reliability and safety. This knowledge is also important for ensuring compliance with local codes, which often mirror these national standards.