Automatic flushing system for filters associated with an irrigation system

A flush system for an irrigation system, the flush system comprising:

• a filter located between a source of a fluid and spray nozzles of the irrigation system, wherein the filter is used for collecting debris in the fluid supplied to the irrigation system by the source prior to the fluid being provided to the spray nozzles;
• a flush outlet in fluid communication with the filter and configured to, when said flush outlet is open, remove the debris captured by the filter during use by using the fluid in the irrigation system to purge such debris out of the filter and through the flush outlet;
• a valve in fluid communication with:
• (i) the source of the fluid, (ii) the filter, and (iii) the flush outlet, wherein when said valve is open, the fluid is provided to the filter and the flush outlet by the valve to flush out the debris from the filter through the flush outlet;
• a control unit in electrical communication with said valve;
• and
• a sensor associated with said control unit and located relative to the filter so as to sense that the irrigation system is in operation by detecting that the fluid is currently in the irrigation system and provided to the filter from the source,
• wherein said control unit is configured to control said valve to open only when said sensor indicates that the irrigation system is in operation with the fluid currently in the irrigation system and provided to the filter from the source, wherein when said valve is open the debris in the filter is purged from the filter via the flush outlet using the fluid in the irrigation system.