A device designed to remove general bacteria and other suspended particles from flowing water by creating a mechanical barrier to elements larger than 0.2 micrometres. It typically consists of a plastic housing with a connector to the water source [e.g., a tap (faucet)] and a 0.2 micrometre filtering membrane [e.g., made of nylon, polyvinylidene fluoride (PVDF), or polyethersulfone (PES)]; a prefiltration of the water to remove larger particles is typically recommended. It is typically used for hygienic and surgical hand washing, rinsing of medical devices (e.g., endoscopic), body washing/showering of patients, and balneotherapy. This is a reusable device that must be sterilized daily.