Okla. Admin. Code § 252:626-19-4 - Water main design for systems providing domestic water only
This section applies only to water systems without full fire protection capabilities.
(1)
Sizing of mains. Size all water mains after a hydraulic analysis based on flow demand of not less than 1 gal/min per service connection. The minimum size of water mains is 2 inches in diameter.
(2)
Hydrants. Fire hydrants with pumper outlets shall not be connected to water systems or mains unless the system is designed to carry fire-flows.
(3)
Valves. Locate valves at not more than 1 mile intervals and at all branch lines from the main line.
Notes
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