We installed a water filtration system for another orphanage in Cambodia. We used an ultra-membrane filter with pore size of 0.1 micron. It is able to remove bacteria and give clean water. It requires a minimum water presure of 2 bar to operate, hence we need to install an electric water pump before the filter so that it has enough pressure to operate the filter. A setback of this system is it requires regular back flushing in order to clean the filter to prolong the filter's life. Once the filter to clog up, it is time to replace a new filter. Suitable for making rainwater drinkable.
