Cal. Code Regs. tit. 25 § 1268

Current through Register 2024 Notice Reg. No. 43, October 25, 2024
Section 1268 - Pipe Size
(a) Each lot drain inlet shall be assigned a waste loading value of six (6) fixture units and each park drainage system shall be sized according to Table 1268-1 or as provided herein. Drainage laterals shall be not less than three (3) inches in diameter.
(b) A park drainage system in which the grade, slope, or sizing of drainage pipe does not meet the minimums specified in Tables 1268-1 or 1268-2 shall be designed by a registered engineer for a minimum velocity flow of two (2) feet per second.
(c) Park drainage systems installed without P-traps or vents may be sized for individually vented systems in accordance with Table 1268-1.
(d) A park drainage system which exceeds the fixture unit loading of Table 1268-1 shall be designed by a registered engineer.

TABLE 1268-1

Drainage Pipe Diameter and Number of Fixture Units on Drainage System

Size of Drainage Pipe (Inches)Maximum No. of Fixture Units Individually Vented SystemMaximum No. of Fixture Units Wet Vented SystemTerminal & Relief Vent Wet Vented System (Inches)
3 35 142
4180 353
53561804
66003564

TABLE 1268-2

Minimum Grade and Slope of Drainage Pipe

Pipe Size (inches)

Slope per 100 ft. (inches)

Pipe Size (inches)

Slope per 100 ft. (inches)

22568
32084
415103 1/2
511123

Cal. Code Regs. Tit. 25, § 1268

1. Amendment filed 7-6-2004; operative 7-6-2004 pursuant to Government Code section 11343.4 (Register 2004, No. 28).

Note: Authority cited: Section 18300, Health and Safety Code. Reference: Section 18630, Health and Safety Code.

1. Amendment filed 7-6-2004; operative 7-6-2004 pursuant to Government Code section 11343.4 (Register 2004, No. 28).