<html> <head> <title>Rule 74:02:09:07 Automatic low pressure drain.</title> <META NAME="Keywords" Content="Administrative Rules 74:02:09:07"> <META NAME="Description" Content="Administrative Rules 74:02:09:07 Automatic low pressure drain."> <meta name=Generator content="Microsoft Office HTML Filter 2.0"> <meta http-equiv=Content-Type content="text/html; charset=windows-1252"> <meta name=Originator content="Microsoft Word 10"> <style> <!-- --> </style> </head> <body lang=EN-US> <div> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>74:02:09:07.&nbsp;&nbsp;Automatic low pressure drain.</b> 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.</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 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.</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 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.</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Source:</b> 15 SDR 81, 15 SDR 84, effective November 27, 1988.</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>General Authority:</b> SDCL <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=34A-2A-3">34A-2A-3.</A></font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Law Implemented:</b> SDCL <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=34A-2A-3">34A-2A-3.</A></font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </div> </body> </html>