Technical Table 1: Irrigation Wall Mounted Controllers
Table 2: Valves
you’ll see the pressure drop quickly. For those with a non-pressurised system, where sprinklers are not performing as well as you’d expect them to whilst the pumps are working flat-out, that’s indicative of a problem somewhere, too.
If you have had a burst, once fixed, it’s important to flush that section of the pipework extensively to prevent any pollutants travelling through the system, potentially causing further blockages. Similarly, if you have a new system, flushing before operating will eliminate any installation remnants and shavings from the pipework.
Seasonal checks
It’s easy with an irrigation system to fall into the trap of out of sight out of mind; but regular checking is important for the longevity and ‘health’ of your system. It goes without saying that you wouldn’t expect your machinery to run well if you hadn’t changed the oil for ten years, so it’s a good idea, similarly to winter and spring machinery maintenance, to give your irrigation system a thorough seasonal check. It’s equivalent to giving your irrigation system a good MOT, giving you the confidence that your system is fit for purpose.
Irrigation Wall Mounted Controllers
First of all, check the displays. If incorrect information is showing, that could identify a recent power surge or outage, whilst no display at all indicates a problem with the wiring, or it could be as simple as a blown fuse.
You may have been alerted to an issue because the water cycle is repeating, the sward is not watered, one zone does not function or there’s no water to one or all of the zones. Our handy chart on Controllers indicates possible causes for all these scenarios and solutions - see table 1.
If the system is ramping up all the time with the pumps switching on and off or, in an older system, if the pressure keeps dropping, these signs generally indicate a leak or burst and, if that’s the case, speed is of the essence to get it fixed and minimise expense. The energy cost of the system continuously bringing in the pumps, plus paying for wasted water at, say, £1.75 per cubic metre, will soon add up.
108 I PC APRIL/MAY 2016
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