An inline drip irrigation system layout is installed on slopes exceeding three percent in the direction of flow. The assembly incorporates a PVC supply manifold and PVC flush manifolds connected to perimeter laterals positioned two inches from the edge. Inline spring check valves and air or vacuum relief valves are plumbed to the flush manifold at high points and just below each check valve. An automatic flush valve is plumbed to the flush manifold at the low point of the slope. Dripline is omitted from the very bottom of the slope, featuring twenty-five percent more spacing at the bottom one-third of the slope. An operation indicator is installed at the landscape edge near the flush valve at the end of the dripline zone.
PVC FLUSH MANIFOLD AREA PERIMETER DRIPLINE AIR/VACUUM RELIEF VALVE PLUMBED TO PVC FLUSH MANIFOLD JUST BELOW EACH CHECK VALVE PVC LATERAL LINE FROM REMOTE CONTROL VALVE INLINE SPRING CHECK VALVE PERIMETER LATERALS 2" FROM EDGE AUTOMATIC FLUSH VALVE PLUMBED TO FLUSH MANIFOLD AT LOW POINT HIGH POINT ON SLOPE USE WHEN SLOPE EXCEEDS 3% IN DIRECTION OF FLOW AIR/VACUUM RELIEF VALVE PLUMBED TO PVC FLUSH MANIFOLD AT HIGH POINT PVC SUPPLY MANIFOLD DO NOT INSTALL DRIPLINE AT THE VERY BOTTOM OF SLOPE 25% MORE SPACING AT BOTTOM 1/3 OF SLOPE IN OPERATION INDICATOR INSTALLED AT THE EDGE OF THE LANDSCAPE, AT END OF DRIPLINE ZONE NEAR FLUSH VALVE FV
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