Which factor does NOT influence the material selection for sprinkler pipes?

The selection of materials for sprinkler pipes is influenced by various factors that ensure system reliability and compliance with safety standards. Sprinkler head design does not directly impact the choice of pipe material because the pipes need to be compatible with a range of designs and configurations of sprinkler heads.

On the other hand, environmental conditions, such as exposure to chemicals or temperature extremes, play a significant role in determining the appropriate material. Water temperature is also crucial since certain materials have limitations regarding the temperature ranges they can withstand. Additionally, regulatory requirements mandate compliance with specific standards regarding materials based on the application and the geographical area—factors that help maintain safety and functionality. Thus, while sprinkler head design is essential for system performance, it does not directly dictate the material selection for the associated pipes.