612.3 Sprinklers.

Sprinklers shall be installed in accordance with Section 612.3.1 through Section 612.3.7.

(b) The entire floor under the unprotected ceiling

pocket is protected by the sprinklers at the lower ceiling elevation. (c) Each unprotected ceiling pocket is separated

from an adjacent unprotected ceiling pocket by

from an adjacent unprotected ceiling pocket by not less than a 10 feet (3048 mm) horizontal distance. (d) The interior finish of the unprotected ceiling

pocket is noncombustible material.

(d) The interior finish of the unprotected ceiling

pocket is noncombustible material. (e) Skylights not exceeding 32 square feet (2.97

m ² ).

(e) Skylights not exceeding 32 square feet (2.97

m ² ). 612.3.2 Sprinkler Installation. Sprinklers shall be listed residential sprinklers and shall be installed in accordance with the sprinkler manufacturer’s installation instructions. 612.3.3 Temperature Rating and Separation fromHeat Sources. Sprinklers shall have a temperature rating of not less than 135°F (57°C) and not more than 170°F (77°C). Sprinklers shall be separated from heat sources in accordance with the sprinkler manufacturer’s installation instructions. Exception: Sprinklers located close to a heat source in accordance with Section 612.3.3.1 shall be intermediate temperature sprinklers.

612.3.1 Required Sprinkler Locations. Sprinklers shall be installed to protect all floor areas of a dwelling unit in one and two-family dwellings or townhouses. Exceptions: (1) Attics, crawl spaces, and normally unoccupied con cealed spaces that do not contain fuel-fired appli

(2) In attics and concealed spaces located directly

beneath a roof. (3) Within the distance to a heat source in accor dance with Table 612.3.3.1.

(1) Attics, crawl spaces, and normally unoccupied con cealed spaces that do not contain fuel-fired appliances do not require sprinklers. In attics, crawl spaces, and normally unoccupied concealed spaces that contain fuel-fired equipment, a sprinkler shall be provided to protect the equipment; however, sprinklers shall not be required in the remainder of the space. (2) Clothes closets, linen closets, and pantries that do not

exceed 24 square feet (2.2 m ² ) in area, with the small

612.3.3.1 Intermediate Temperature Sprin-klers. Sprinklers shall have an intermediate temperature rating of not less than 175°F (79°C) and not more than 225°F (107°C) where installed in the following locations: (1) Directly under skylights, where the sprinkler is

exposed to direct sunlight.

(1) Directly under skylights, where the sprinkler is

exposed to direct sunlight. (2) In attics and concealed spaces located directly

beneath a roof.

(2) Clothes closets, linen closets, and pantries that do not

exceed 24 square feet (2.2 m ² ) in area, with the smallest dimension not exceeding 3 feet (914 mm) and having wall and ceiling surfaces of gypsum board. (3) Bathrooms and toilet rooms that do not exceed 55

square feet (5.1 m ² ) in area.

(3) Bathrooms and toilet rooms that do not exceed 55

square feet (5.1 m ² ) in area. (4) Detached garages; carports; with no habitable space

above; open attached exterior porches; unheated

Detached garages; carports; with no habitable space

above; open attached exterior porches; unheated entry areas, such as mud rooms, that are adjacent to an exterior door; and similar areas.

(3) Within the distance to a heat source in accor dance with Table 612.3.3.1. 612.3.4 Freezing Areas. The piping system shall be protected in accordance with the requirements of Chapter 3. Where sprinklers are required in areas that are subject to freezing, dry-sidewall or dry-pendent sprinklers extending from a non-freezing area into a freezing area shall be installed. Where fire sprinkler piping cannot be adequately protected against freezing, the system shall be designed and installed in accordance with NFPA 13D. 612.3.5 Coverage Area Limit. The area of coverage of a single sprinkler shall be based on the sprinkler listing and the sprinkler manufacturer’s installation instructions. The area of coverage of a single sprinkler shall not exceed 400 square feet (37.16 m ² ).

158 2019 CALIFORNIA PLUMBING CODE

WATER SUPPLY AND DISTRIBUTION

TABLE 612.3.3.1 LOCATIONS WHERE INTERMEDIATE TEMPERATURE

SPRINKLERS ARE REQUIRED

612.3.8 Backflow Protection. A backflow preventer shall not be required to separate a sprinkler system from the water distribution system, provided that: (1) The system complies with NFPA 13D or Section

R313, and

(1) The system complies with NFPA 13D or Section

R313, and (2) Piping material are suitable for potable water in

accordance with the California Plumbing Code, and

(2) Piping material are suitable for potable water in

accordance with the California Plumbing Code, and (3) The system does not contain antifreeze or have a fire

department connection.

(3) The system does not contain antifreeze or have a fire

department connection.