S.D. Admin. R. 74:02:09:07
The low-pressure drain shall be located on the bottom of the horizontal pipeline between the irrigation pump and the irrigation pipeline check valve, as illustrated in Appendix A at the end of this chapter.
The valve shall be sized in accordance with the manufacturer's specifications. The drain shall have an orifice of at least three-quarter inch diameter. The drain shall not extend into the horizontal pipe beyond the inside surface of the bottom of the pipe and shall be at least two inches above grade.
When the pipeline water flow stops, the drain must automatically open. A tube, pipe, or similar conduit shall be used to discharge the solution at least 20 feet from the irrigation water source. The solution shall be contained and prevented from entering the water supply source.
S.D. Admin. R. 74:02:09:07
General Authority: SDCL 34A-2A-3.
Law Implemented: SDCL 34A-2A-3.