Abstract: A filtration and purification apparatus for use in water lines of both domestic and industrial applications, wherein water must be purified and filtered prior to use--particularly with respect to human consumption thereof. The filter/purifier comprises a housing having an inlet port which discharges into a filter chamber, wherein the incoming water passes through a filter member into an adjacent metering compartment which controls the flow of water both through an outlet port and a communicating purifying chamber, the purifying chamber including a predetermined amount of iodine crystals stored therein.