Candle Filter Purifier
Water purifiers with candle type filters have a very basic operating mechanism. The candle has very minute pores. Any particle which has the size larger than the pores gets blocked out and cannot pass on to the clean side. It does not require any electricity for operation. But the downside is that it fails to block microbes and so water still needs to be boiled before consumption. Also the candle needs to be cleaned up frequently for effective operations.
