Pipe Schedule System Sizing Calculator

Size sprinkler piping using NFPA 13 pipe schedule method for light and ordinary hazard occupancies.

Input Parameters

Results

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Branch Line Size
in
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Cross Main Size
in
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Riser Size
in
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Max Heads Allowed
Note: Pipe schedule method is limited to 5,000 sq ft (LH) or 5,000 sq ft (OH) per floor. Systems exceeding these limits or in EH occupancies require hydraulic calculations per NFPA 13 Section 28.

Reference

NFPA 13 Pipe Schedule Method (Section 23.5) Light Hazard - Table 23.5.3.1: 1" = 2 heads, 1.25" = 3 heads, 1.5" = 5 heads, 2" = 10 heads Ordinary Hazard - Table 23.5.3.2: 1" = 2 heads, 1.25" = 3 heads, 1.5" = 5 heads, 2" = 8 heads Max area: 52,500 sq ft for pipe schedule systems