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POLYETHYLENE PIPE <br /> A. SWING JOINTS SHALL BE THICK-WALLED WITH A MINIMUM <br /> PRESSURE RATING OF 75 PSI IN ACCORDANCE WITH ASTM D- <br /> 2239,,,99 , <br /> B . LOW PRESSURE POLYETHYLENE PIPE FOR MICRO IRRIGATION <br /> SYSTEMS SHALL CONFORM TO ASAE S435 , <br /> C . USE FITTINGS MANUFACTURED SPECIFICALLY FOR THE TYPE <br /> AND DIMENSIONS OF POLYETHYLENE PIPE USED . <br /> SPRINKLERS , SPRAY HEADS AND EMITTERS <br /> A . SELECT UNITS AND NOZZLES IN ACCORDANCE WITH THE SIZE <br /> OF THE AREA AND THE TYPE OF PLANT MATERIAL BEING <br /> IRRIGATED . <br /> B . USE EQUIPMENT THAT IS PROTECTED FROM CONTAMINATION <br /> AND DAMAGE BY USE OF SEALS , SCREENS , AND SPRINGS <br /> WHERE SITE CONDITIONS PRESENT A POTENTIAL FOR DAMAGE . <br /> C . SUPPORT RISER- MOUNTED SPRINKLERS TO MINIMIZE <br /> MOVEMENT OF THE RISER RESULTING FROM THE ACTION <br /> OF THE SPRINKLER . <br /> D . SWING JOINTS SHALL BE CONSTRUCTED TO PROVIDE A <br /> FLEXIBLE , LEAK- FREE CONNECTION BETWEEN THE SPRINKLER <br /> AND LATERAL PIPELINE TO ALLOW MOVEMENT IN ANY <br /> DIRECTION AND TO PREVENT EQUIPMENT DAMAGE , <br /> E . SPRINKLERS AND EMITTERS USED WITH RECLAIMED WATER <br /> SHALL BE COLORED PURPLE OR IDENTIFIED BY OTHER <br /> ACCEPTED MEANS AS DESCRIBED IN S62-610FAC TO <br /> DIFFERENTIATE RECLAIMED WATER FROM DOMESTIC OR <br /> OTHER WATER . <br /> VALVES <br /> A . VALVES MUST HAVE A MAXIMUM WORKING PRESSURE RATING <br /> EQUAL TO OR GREATER THAN THE MAXIMUM PRESSURE OF <br /> THE SYSTEM , BUT NOT LESS THAN 125 PSI , THIS REQUIREMENT <br /> MAY BE WAIVED FOR LOW MAINLINE PRESSURE SYSTEMS ( 30 <br /> PSI OR LESS ) , <br /> B . USE VALVES THAT ARE CONSTRUCTED OF MATERIALS <br /> DESIGNED FOR USE WITH THE WATER AND SOIL CONDITIONS <br /> OF THE INSTALLATION , <br /> C . USE VALVES THAT ARE DESIGNED TO BE PROTECTED FROM <br /> DEBRIS BUILDUP IN THE CONTROL PASSAGES IF <br /> THERE IS A POTENTIAL FOR SUCH CONTAMINATION FROM THE <br /> Ir WATER SUPPLY . <br /> D . USE VALVES THAT ARE CONSTRUCTED FROM MATERIALS THAT <br /> WILL NOT BE DETERIORATED BY CHEMICALS INJECTED INTO <br /> THE SYSTEM , <br /> F :\Engineering\Special Projects\Eagle Trace Phase 2\Contract Documents\Eagle Trace Subdivision Phase <br /> MIRRIGATION SPECIFICATIONS from W. F. McCain .doc ' 2 <br />