Dripline Support

HDL - Flush Valve


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The Automatic Flush Valve (AFV) allows debris to be flushed out of any dripline system.

  • It is good practice to install an AFV at the end of any single dripline or grid of dripline.
  • Flush the zone prior to use. A general rule of thumb is one second for every 2' (0.6 m) of dripline; sometimes dirt is not visible right away.
  • An AFV may be used for any dripline system without check valves and will flush the line every time the system starts. Install after initial system flush.



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