Residential sprinkler systems require what size piping and what supply requirements?

Residential sprinkler systems require what size piping and what supply requirements?

• A. 3/4 inch piping; Requires a dedicated fire department connection.
• B. Minimum 1/2 inch piping; May use domestic water supply with a single household shut off.
• C. 1 inch piping; Connect to a public firefighting main.
• D. 1/4 inch piping; May be supplied by a garden hose.

Answer: (B)

Residential sprinkler systems are designed to draw water from the home’s domestic supply rather than a separate fire main, using piping sized for small-diameter sprinkler feeds. The minimum piping size is 1/2 inch, which provides sufficient flow for a typical single-family dwelling without excessive complexity or cost. The system is fed from the domestic water supply and controlled by a single shut-off valve at the dwelling, allowing isolation for maintenance or an issue without needing a dedicated fire department connection. A dedicated fire department connection or tying into a public fire main is not typical for these residential systems, and using very small piping or household hoses would not meet the flow or reliability requirements.

Residential sprinkler systems are designed to draw water from the home’s domestic supply rather than a separate fire main, using piping sized for small-diameter sprinkler feeds. The minimum piping size is 1/2 inch, which provides sufficient flow for a typical single-family dwelling without excessive complexity or cost. The system is fed from the domestic water supply and controlled by a single shut-off valve at the dwelling, allowing isolation for maintenance or an issue without needing a dedicated fire department connection. A dedicated fire department connection or tying into a public fire main is not typical for these residential systems, and using very small piping or household hoses would not meet the flow or reliability requirements.