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Frequently asked questions about our plumbing and fire services.
NFPA 13D systems are required for single-family homes and duplexes, while NFPA 13R systems apply to multi-family residential buildings up to four stories. Both are adopted through local building codes and enforced by the AHJ. RPI ensures each system meets all applicable code requirements.
RPI designs systems based on NFPA standards, local code amendments, building layout, and available water supply. Designs account for required flow, pressure, and sprinkler placement and are prepared for permitting and AHJ approval.
Installation includes piping, sprinkler heads, valves, and water supply connections. 13D systems are often integrated with domestic plumbing, while 13R systems typically require a dedicated fire service. All systems are installed and tested to code.
Yes, both systems must be coordinated for proper sizing, routing, and water demand. Because RPI handles plumbing and fire protection, systems are designed and installed together, reducing conflicts and rework.
Projects typically require plan review, permitting, inspections, testing, and final approval by the AHJ. RPI manages documentation and coordinates inspections to keep projects on schedule.
Early involvement helps confirm code requirements, water supply capacity, and system layout, reducing delays, change orders, and installation issues later in the build. Reach out to our team and we will help you with your project needs.