Season for cleaning drains
The best time to flush out drain pipes, by far, is in the autumn and winter. But when it becomes apparent, during periods of heavy rainfall in other seasons, that the pipes are not draining the water as they should, it is naturally important to tackle the problem straight away.
For the cleaning to have optimal effect, the ground water must be at the level of the drain pipes or slightly higher. The drainage of water during the winter season makes cleaning even more effective. Moreover, the higher groundwater level during this season means that the soil immediately surrounding the drain pipe is not completely dry. This minimizes the risk that soil particles will be washed into the pipe again.
While it is most effective to clean the drain pipes (or have them cleaned) during the winter season, this is also the most practical period, because the plots are usually fallow at this time of year. There is generally also more time available for the farmer or contractor to carry out this work.