Eyewash stations are available in either portable or plumbed versions. Portable eyewash stations feature a self-contained source of flushing fluid and are either gravity-fed or pressurized from an external source. Plumbed stations are those that are permanently connected to a source of potable water.
Secondary devices are intended to support primary units, and include eyewash stations and bottles that supply less than the primary minimum flushing amounts. Secondary eyewash units may be placed close to hazards to be available for immediate flushing en route to a primary device, and can also be used for continued irrigation while transporting an injured person to medical care. Secondary devices are also helpful for flushing the eyes of irritants, such as dust, that do not require the full 15 minutes of flushing.