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Humes is an approved distribution agent and manufacturing partner for Stormwater360 - New Zealand’s leading supplier of stormwater treatment technology, products and services.


The ESK™ is an advancement in hydrocarbon treatment and spill control, and is a key product in the Stormwater360 range.


The ESK™ is a passive high efficiency coalescing separator that removes free oil from contaminated stormwater runoff and has a built-in shutoff valve to prevent spills and storage capacity excess exiting the device. The device is ideally suited for sites where specific effluent targets are specified, or for sites where removal of oil and grease is the greatest concern e.g. fuel stations, fuel distribution stations, car servicing workshops, etc. It is typically sized to remove oil droplets as small as 10 microns and achieve an effluent concentration of 5 mg/L or less. 



  • Offers users a more efficient and reliable means to manage oil, petrol and diesel in refuelling areas
  • Separates free oil from water using gravitational and coalescing technology
  • Standard products accommodate a large variety of flows
  • Automatic shutoff valve
  • Easy to install and maintain
  • Reusable and washable media
  • Smaller footprint and depth than traditional oil/water separator


The ESK™ is stocked by Humes and can be purchased through your Humes account.


For further information, please visit the Stormwater360 Website or call your local Humes Sales Rep or phone 0800 502 112.


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