The purpose of filtration in an irrigation system, is to protect the emitter, and to an extent, the efficiency of the entire system. With precision irrigation systems, such as drip and micro-sprinkler irrigation, the risk of emitter clogging increases as emitters are smaller. It becomes increasingly important to make the correct choices in filter selection. Filtration must be designed meticulously, as it is a very expensive component of the irrigation system and will determine the efficiency and sustainability of the entire system.
A host of factors must be considered when making decisions around: the type of filtration system, the filter grade as well as the capacity of the system.
The three most important factors are:
The type of emitter selected will determine the grade of filtration required and is often the most important factor to consider. The grade of filtration must be equal to or smaller than a fifth of the emitter outlet size. The water quality and the flow rate required will determine the capacity (size) of the filtration system.
Factors to consider in filtration system selection:
Most importantly, remember to not cut corners when planning the filtration section of your irrigation system. As mentioned, the success of filtration will determine the efficiency and sustainability of the entire system. Do not allow your filters to cause a weak link in your system.