What are the piping size and supply requirements for residential sprinkler systems?

The choice that states a minimum of 3/4 inch piping with a single household shut-off is correct because this diameter is typically aligned with the needs of residential sprinkler systems. Sprinkler systems require adequate water flow and pressure to function effectively in the event of a fire. A 3/4 inch pipe is generally sufficient to meet these hydraulic demands while maintaining necessary pressure levels.

Using 3/4 inch piping helps ensure that water can be distributed evenly to the sprinkler heads throughout the home. Additionally, incorporating a single household shut-off simplifies the system maintenance and operation, allowing the homeowner to easily manage the water supply for the fire protection system without affecting other plumbing fixtures.

In contrast, the minimum size of 1 inch or 1/2 inch may not adequately support the required flow rates for the sprinklers, especially in larger homes or areas that require greater fire suppression capacity. Moreover, the option indicating that there are no specified requirements overlooks the established standards and regulations that dictate appropriate piping sizes for safety and efficacy in fire protection systems.