Our aboveground oil/water separators combine a unique rectangular steel tank design with state-of-the-art coalescer technology to provide flow rates comparable to larger units.


These systems are designed to separate free oils and settleable solids from rainwater runoff and washdown applications in a gravity or pumped flow for intermittent, variable, or first flush flow of oil, water, or a combination of non-emulsified oil/water.


Systems are installed either at grade or below grade (within a vault) and feature 10 PPM effluent discharge, low maintenance, and the superior quality that we deliver.


Additional Features include:


  • Unique inlet/outlet design minimizing external pumping
  • Support feet for convenient off-loading
  • Removeable top making coalesce units and debris plates accessible.
  • Coalescer units are constructed of non-metallic oleophilic materials for enhanced performance.



Typical applications for Aboveground Oil/Water Separators are:


Equipment Washdown/Vehicle Maintenance Facilities

Water from washdown sources are contaminated with oil and/or grease from trucks, cars and other dirty equipment.  Either through direct flow or pumping when necessary, CSI Oil/Water Separator Systems remove free oil and grease to achieve an effluent quality of 10ppm to meet your discharge requirements. The concentrations and types of contaminants determines the allowable flow rate through the system.


Specialty application separators are also available to meet specific needs such as:


  • Mop-up units
  • Portable units on casters
  • Rainwater runoff


Remediation Systems

CSI Oil/Water Separators remove free oil and grease to achieve an effluent quality of 10ppm to meet discharge requirements.



All our aboveground oil/water separators are designed and tested in accordance with the following criteria:


  • U.S. Coast Guard Test Method 46 CFR 162.050
  • The API MAual on Desposal of Refinery Wastes
  • Stokes Law
  • EPA Test Method 413.1 and 413.2
  • API Bulletins NO. 421 and 1630 (first selection)
  • UL 142


Based on the operating parameters, our oil/water separators can achieve effluent levels of 10 PPM.


The major design parameters which determine your specific needs include:


  • Specific gravity or contaminants
  • Inlet flow rates
  • inlet oil concentration
  • Oil storage capacity
  • Oil spill capacity
  • Temperature
  • Effluent quality requirement


Using the Design/Sizing Questionnaire, the proper system can be designed to your application.


For product literature, specifications, drawings, and installation instructions Click Here

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