Liquid-filled pressure gauge. Photo: L. Schwankl.
Due to the elements, pressure gauges installed in a microirrigation system do go bad. It is important that any pressure gauges installed in key locations, such as upstream and downstream of filters and downstream of pressure-regulating valves, be accurate. Pressure gauges that are exposed to the sun may need to be replaced every year. While they are more expensive than other models, liquid-filled pressure gauges may be a good choice.
