Ekolu has a prefilter catridge where the coarse debris is removed. As well as the other filters from the Eko family, the Ekolu is an hydraulic filter with a programmer that cannot be modified by the end user. The programmer can be used with batteries or with a transformer. It is very easy to handle, with a compact design that responds to the needs of the market. Very little water is used in the process to clean the screen cartridge.