Oklahoma Administrative Code
Title 252 - Department of Environmental Quality
Chapter 626 - Public Water Supply Construction Standards
Subchapter 17 - Finished Water Storage
Section 252:626-17-4 - Distribution storage
Current through Vol. 41, No. 13, March 15, 2024
The maximum design variation between high and low levels in storage structures providing pressure to distribution system is 30 feet.
(1) Drainage. Design storage structures that provide pressure directly to the distribution system so they can be isolated from the distribution system and drained for cleaning or maintenance without losing pressure in the distribution system. Pipe the drain to the ground surface with no direct connection to a sewer or storm drain.
(2) Level controls. Provide adequate controls to maintain levels in distribution system storage structures.
(3) Inlet and outlet lines. Provide separate inlet and outlet lines for positive circulation of water in the tank. Terminate the inlet line at a minimum elevation of 30% or greater tank height to ensure adequate circulation in the tank. Locate the outlet line at least 18 inches above bottom of tank to prevent withdrawal of sediment.
Added at 18 Ok Reg 1612, eff 6-1-01; Amended at 25 Ok Reg 2304, eff 7-11-08