Line Flushing Valves eliminate the need for periodic manual flushing. They are not required on a zone of Techline CV dripperline because of Techline CV's unique check valve feature, but they do work well with Techline as a means of flushing the lines automatically.
These "automatic" flush valves release approximately one gallon of water each time the zone is turned on. Observe the flushing operation at each line flushing valve at the beginning of each irrigation season to ensure that flushing is occurring properly.
If the line flushing valve does not seal, (continues to flush) disassemble the flush valve. Inspect all components, cleaning or replacing all components, and reassemble. You should be able to blow and draw air through the dripper 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 57 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 each irrigation season until the flowing water is visibly clean. The zone may need to be flushed more frequently depending on the water source.
Flushing is also recommended anytime that the system has been repaired.