What type of piping is required for use according to the manufacturer's manual?

Flexible piping and fittings are specified in the manufacturer's manual for dry chemical extinguishing systems because they provide the necessary adaptability and ease of installation while maintaining a secure and reliable connection. This type of piping can accommodate various configurations and movements without compromising the integrity of the system, which is essential for ensuring proper function during an emergency.

Flexible piping is especially useful in environments where there may be vibrations, expansions, or contractions due to temperature changes. This adaptability helps avoid potential leaks that can occur with rigid systems. Additionally, the fittings associated with flexible piping are designed to connect securely, reducing the risk of accidental disconnection or failure, which could hinder the firefighting capabilities of the system.

Rigid metal piping, while durable, lacks the flexibility needed for some applications and can be more challenging to install and modify. On the other hand, materials like flexible plastic piping and standard garden hoses do not usually meet the fire protection requirements outlined in NFPA standards, which emphasize the need for materials that can withstand the harsh conditions experienced in potential fire scenarios. Therefore, the use of flexible piping and fittings is aligned with best practices to ensure system reliability and safety as indicated in the manufacturer's guidelines.