The disposal of air compressor lubricant carryover in condensate is a concern, as is the variety of regulations across the country. Installation of an oil-water separator is simple. The oily condensate from each drain valve is individually piped to a depressurization chamber to reduce pressure to atmospheric. The clean water is then piped into an waste water drain. The separated oil is contained within the cartridge and/or held in a collection vessel for proper disposal.