74:02:09:06Vacuum relief valve.
Section · Administrative Rules of South Dakota · View on sdlegislature.gov ↗
The vacuum relief valve shall be located on the top of the 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.
Source: 15 SDR 81, 15 SDR 84, effective November 27, 1988.