ARSD 74:02:09:10. Inspection port

The inspection port shall be located on the pipeline between the irrigation pump and the irrigation pipeline check valve, as illustrated in Appendix A at the end of the chapter. The vacuum relief valve connection may serve as the inspection port. The inspection port or viewing device shall be situated in such a manner that the inlet to the low-pressure drain can be observed. A minimum four-inch orifice or viewing area is required.