NFPA 13D Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes

Help make one- and two-family dwellings safer from fire risks and related hazards.

NFPA 13D, Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, features up-to-date criteria addressing every aspect of sprinkler design and protection, water supplies, equipment, and placement in one- and two-family dwellings, manufactured homes, and townhouses.

Installers and contractors need the latest edition of this standard to address different types of construction, work with the latest technologies, and help reduce fire risks. The standard applies to one- and two- family dwelling units and manufactured homes to allow for the installation of cost-effective fire sprinkler systems in these types of residential occupancies. 

The 2025 edition features several significant updates including:

• Revised conversion factors in Chapter 1
• New definition for “ceiling pocket”
• Differentiation between LED-style lights and other lights as a heat source
• New guidance on installing sidewall sprinkler beneath a sloped ceiling
• Clarification on closets with no doors
• Location criteria on sprinkler installation above fuel-fire equipment
• Added pipe sizing calculation worksheet
• Updated Chapter 12 annex to identify additional tasks that should be performed during an inspection

Table of Contents: 

Chapter 1 Administration

1.1 Scope.
1.2 Purpose.
1.3 Retroactivity.
1.4 Equivalency.
1.5 Units.
1.6 New Technology.

Chapter 2 Referenced Publications

2.1 General.
2.2 NFPA Publications.
2.3 Other Publications.
2.4 References for Extracts in Mandatory Sections.

Chapter 3 Definitions

3.1 General.
3.2 NFPA Official Definitions.
3.3 General Definitions.

Chapter 4 General Requirements

4.1 Sprinkler Temperature Ratings.
4.2 Tube.
4.3 Listed or Labeled.
4.4 Documentation.
4.5 Qualifications.

Chapter 5 System Components

5.1 General.
5.2 Aboveground Pipe and Equipment.
5.3 Water Supply Pipe and Fittings.
5.4 Pre-Engineered Systems.

Chapter 6 Water Supply

6.1 General Provisions.
6.2 Water Supply Sources.
6.3 Multipurpose Piping System.
6.4 Manufactured Home Water Supply.
6.5 Common Supply Pipes.

Chapter 7 Installation

7.1 Valves.
7.2 Drains and Test Connections.
7.3 Pressure Gauges.
7.4 Piping Support.
7.5 Sprinklers.
7.6 Alarms.
7.7 Attics.
7.8 Multipurpose and Passive Purge Systems.

Chapter 8 Sprinkler Position and Location

8.1 Design Criteria.
8.2 Position of Sprinklers.
8.3 Location of Sprinklers.

Chapter 9 Protection from Freezing

9.1 System Types.
9.2 Antifreeze Systems.
9.3 Dry Pipe and Preaction Systems.

Chapter 10 Discharge and Hydraulic Calculations

10.1 Design Discharge.
10.2 Number of Design Sprinklers.
10.3 Piping Configurations.
10.4 Pipe Sizing.

Chapter 11 System Acceptance

11.1 General.
11.2 Acceptance Tests.

Chapter 12 Inspection, Testing, and Maintenance

12.1 General.
12.2 Inspections and Tests.
12.3 Maintenance.

Annex A Explanatory Material
Annex B Incentives for Residential Fire Sprinkler Use — Advantages for Builders, Developers, and Communities
Annex C Inspection and Testing at Time of Sale.
Annex D Informational References

2025 (9781455931477)

2022 (9781455927821)

2019 (9781455920471)

2016 (9781455911578)

2007 (NFPA13D-07)