A single control valve designed to shut off both the domestic system and the sprinkler system must be installed unless a separate shutoff valve for the sprinkler system is also provided, according to NFPA 13D. True or False?

The statement is accurate based on the guidelines set forth in NFPA 13D, which addresses the installation of sprinkler systems in one- and two-family dwellings. According to these regulations, a single control valve can efficiently manage both the domestic water supply and the sprinkler system's water supply. This approach simplifies the plumbing layout and maintenance for residential installations.

In cases where a single valve is utilized, it is crucial that it is designed to control both systems effectively. However, if a separate shutoff valve for the sprinkler system is provided, there may not be a need for the combined valve, which reflects a distinction in operational requirements.

The essential point is that having a single valve can ensure convenient access for maintenance and emergency shut-off, which is valuable for the safety and efficiency of firefighting efforts and domestic water usage. Ensuring compliance with NFPA 13D guidelines helps to enhance safety in residential fire protection systems.