The water meter in the main supply line does not require any specific maintenance, however, if the water is contaminated with mud and silt or foreign material and a filter is not fitted, the meter may clog.

It is important, however, to observe the flow and behaviour of the register on a regular basis. Take the time to watch the water flow and the operation of the magnetic switch. The flow should be smooth and the switch should operate normally. If the flow is observed to be jerky or erratic, it indicates that the operation of the register gears is faulty and the register may need to be serviced or replaced.

In severe cases the flow may be extremely jerky, in this case replace the register.

In cases where the water is from a bore that is high in pH and high in minerals and the water is highly depositive the controller flow meter will require regular maintenance. Fine mineral deposits will accumulate on the magnetic vanes of the meter over time. In some cases this occurs after about 12 months, however, it may be sooner.

This will generally cause the meter to spin at a lower rate and it will underestimate the amount injected per pulse. The controller will recognise this as a “pump on too long” fault and shut down.

The functioning of the flow meter can be checked manually by watching the injection rate on the main controller screen. If the rate is erratic or slower than normal, flow meter maintenance will be required.

For those operators with highly depositive bore water, it is recommended that the controller be reprogrammed to operate on a timed injection as the primary control, with the flow meter giving a secondary reading of the amount injected. This will allow accurate calibration of the injection, especially in high pressure situations, and will also ensure consistency of injection if the flow meter becomes contaminated or fails.

The change to this method of injection requires a software update that must be done at the factory.

It is also recommended that regular maintenance be carried out on the flow meter where the bore water is depositive. In some cases the flow meter will need to be replaced on a regular basis, for example, each twelve months. In others, a six month maintenance program that uses hydrochloric acid to flush the flow sensor and remove the scale may be sufficient.