Profile: Pure Water Systems Inc. is a supplier of BEV certified drinking water filters/purification systems. Our 100-series systems combine the drinking water filtration/purification technologies into a portable countertop housing, which connects quickly and easily to any faucet. Designed for sub-sink installations, the BEV-300 series allows the entire water purification system to be installed beneath the sink, providing pure BEV quality drinking water through a sink mounted chrome faucet. We also offer replacement parts and accessories for the purification systems. The pre-filter in PWST BEV-100 series countertop systems is a carefully engineered design consisting of high grade, high capacity, dedusted, steam washed, bituminous grade granular activated carbon for adsorption of organics, chlorine and chloramines with a 10 micron sediment and colloidal debris entrapment filter.