CSLB Class B General Contractor's License Practice Exam

What type of water connection can you attach residential fire sprinklers to?

1. Dry standpipe

2. Purple pipe

3. Drain pipe

4. Domestic service

The correct answer is: Domestic service

Residential fire sprinklers are typically connected to the domestic water service. This approach ensures that the system is supplied with a reliable source of water that meets the necessary pressure and flow requirements for effective fire suppression. Domestic water systems are designed to provide adequate pressure for regular household use, which also aligns with the operational needs of fire sprinkler systems. Using a domestic service connection helps to ensure compliance with plumbing codes and fire safety regulations, as the water sourced from the domestic supply is treated for safety and availability. It is essential for maintaining the integrity and functionality of the fire suppression system in case of an emergency. Other options may not be suitable for various reasons. For instance, dry standpipes are typically used in commercial spaces and require specific conditions that are not usually present in residential settings. Purple pipe generally indicates reclaimed water, which is not suitable for fire protection systems due to potential contamination and non-potable use. Drain pipes are designed for carrying away waste water, making them completely unsuitable for supplying water to fire sprinkler systems.