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Flush Valve with 3/4" MPT

Flush Valve with 3/4 in.  MPT

The flush valve from DIG Corp. is used to automatically flush the lines of a drip system at the start of each irrigation cycle. Installed at the end of the lateral, the flush valve releases approximately one gallon of water each time the zone is turned on. If installing an automatic flush valve, make sure to cover it with an 8” irrigation box. We suggest observing the flushing operation after the completion of the installation to ensure that each valve is flushing properly, and then to repeat this observation at the beginning of each irrigation season. Check the pressure and compare to the last maintenance inspection.

Part #: A149

Flush valves eliminate the need for periodic manual flushing within a drip irrigation system. These devices are not required on a zone with Excel CV PC drip line due to its emitter check valve feature, but they work well with all other drip line as a means of flushing the lines automatically at the beginning of each irrigation cycle.

  • Maximum pressure: 60 PSI
  • Minimum operating pressure at the flush valves with PC drip line: 20 PSI
  • Minimum pressure at the flush valves : 10 PSI
  • Size: 3/4"
  • Automatic cleaning operation eliminates periodic manual flushing.
  • Flushing reduces sediment build-up in the drip line drip emitters, extending the long-term performance of the drip line and the irrigation system.
  • The unique design of the flush valve reacts to flow, not pressure, allowing operation even at full line pressure.
  • Used with drip irrigation systems and works well with clean or dirty water.

Installation for Line Flushing Valves

If the line flushing valve does not seal (continues to flush), disassemble the flush valve. Inspect all components, cleaning or replacing as necessary, and reassemble. You should be able to blow and draw air through the drip emitter that is attached to the diaphragm, and the diaphragm should be free of any rips or tears.

Damage may occur if the flush valve has been subjected to higher than recommended pressure (greater than 50 PSI).

If manual flush valves or flush ports have been installed in lieu of line flushing valves, they should be opened and the system flushed at least three times in each irrigation season until the flowing water is visibly clean. The zone may need to be flushed more frequently depending on the quality of the water source.

Flushing of a drip system is highly recommended anytime that the system has been repaired.