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// CODE SNIPPET

612.5.3 Sprinkler Pipe Sizing

California Plumbing Code 2019 > 6 Water Supply and Distribution > 612.0 Residential Fire Sprinkler Systems > 612.5 Sprinkler Piping Design > 612.5.3 Sprinkler Pipe Sizing
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The sprinkler piping shall be sized for the flow rate in accordance with Section 612.5.1. The flow rate required to supply the plumbing fixtures shall not be required to be added to the sprinkler design flow for multipurpose or stand alone piping systems. The sizing of the water supply to the plumbing fixtures shall be determined in accordance with this chapter. For multipurpose piping systems, the largest pipe size required based on either the sprinkler piping calculations or the water distribution piping calculations shall be installed.

612.5.3.1 Sprinkler Pipe Sizing Method

The sprinkler pipe shall be sized using the prescriptive method in Section 612.5.3.2 or by hydraulic calculation in accordance with NFPA 13D. The sprinkler pipe size from the water supply source to a sprinkler shall be not less than 3/4 of an inch (20 mm) in diameter. Threaded adapter fittings at the point where sprinklers are attached to the piping shall be not less than 1/2 of an inch (15 mm) in diameter.
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Related Code Sections


612.5.3 Water Supply and Distribution, Sprinkler Pipe Sizing
The sprinkler piping shall be sized for the flow rate in accordance with Section 612.5.1. The flow rate required to supply the plumbing fixtures ...
California Plumbing Code 2016 > 6 Water Supply and Distribution > 612.0 Residential Fire Sprinkler Systems > 612.5 Sprinkler Piping Design > 612.5.3 Sprinkler Pipe Sizing
612.5.3 Water Supply and Distribution, Sprinkler Pipe Sizing
The sprinkler piping shall be sized for the flow rate in accordance with Section 612.5.1. The flow rate required to supply the plumbing fixtures ...
California Plumbing Code 2019 > 6 Water Supply and Distribution > 612.0 Residential Fire Sprinkler Systems > 612.5 Sprinkler Piping Design > 612.5.3 Sprinkler Pipe Sizing
612.5.3.2.1 Water Supply and Distribution, Available Pressure Equation
The available system pressure (P t ) for sizing the sprinkler piping shall be determined in accordance with the Equation 612.5.3.2.1. P t ...
California Plumbing Code 2016 > 6 Water Supply and Distribution > 612.0 Residential Fire Sprinkler Systems > 612.5 Sprinkler Piping Design > 612.5.3 Sprinkler Pipe Sizing > 612.5.3.2 Prescriptive Pipe Sizing Method > 612.5.3.2.1 Available Pressure Equation
612.5.3.2.1 Water Supply and Distribution, Available Pressure Equation
The available system pressure (P t ) for sizing the sprinkler piping shall be determined in accordance with the Equation 612.5.3.2.1 ...
California Plumbing Code 2019 > 6 Water Supply and Distribution > 612.0 Residential Fire Sprinkler Systems > 612.5 Sprinkler Piping Design > 612.5.3 Sprinkler Pipe Sizing > 612.5.3.2 Prescriptive Pipe Sizing Method > 612.5.3.2.1 Available Pressure Equation
612.5.3.2.2 Water Supply and Distribution, Calculation Procedure
The following procedure shall be used to determine the minimum size of the residential sprinkler piping: Step 1 - Determine P sup ...
California Plumbing Code 2016 > 6 Water Supply and Distribution > 612.0 Residential Fire Sprinkler Systems > 612.5 Sprinkler Piping Design > 612.5.3 Sprinkler Pipe Sizing > 612.5.3.2 Prescriptive Pipe Sizing Method > 612.5.3.2.2 Calculation Procedure
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