For the Best "Green" OSW Cleaning & Maintence

Oil Water Separator Cleaning & Maintenance

When vessels of any size are at sea for lengthy periods, it may become necessary to discharge bilge water overboard. If your operation maintains your on-board oil water separator (OWS) units, L-44® OSD Degreaser is a high-performing EPA-certified Safer Choice degreaser tailored for OWS units that assists with increasing processing capacities and enhancing oil content monitor (OCM) accuracies.

The Best OWS Operations & Maintenance

The heavy regulations governing oil presence in discharged water limits oil content to 15 parts per million (ppm) or less. When dealing with onboard inspections by the U.S. Coast Guard to ensure compliance of proper operation of Oil Water Separators, record keeping, and maintenance histories of your OWS units, you want to be certain your OCM is operating accurately.

If your maritime company is found to be discharging oil levels above 15 ppm or your records are determined to be falsified, non-compliance can result in substantial fines, including imprisonment.  So what does your OWS degreaser have to do with this compliance?

L44 OSD Improves Water Discharge Rates

Depending on the degreaser used – you could be dramatically affecting the rate at which water is discharged and the accuracy of the oil-to-water OCM reading. Regardless of onboard or land-based OWS operations, the use of harsh chemicals in most commercial degreasers can have a substantial impact on the efficiency and accuracy of an OWS’s oil content monitor (OCM).

The use of a degreaser with poorly chosen ingredients can impede the rate at which water is discharged and interfere with the OCM’s ability to accurately determine the true oil content of the water being discharged.*

Eco-friendly, high-performance, Safer Choice certified L-44 OSD was formulated to provide excellent degreasing for engine room cleaning chores with a unique focus on enhancing OWS operations, increasing processing capacities and improving OCM accuracies.

Benefits of OSD

L44 OSD is available in cases of four 1-gallon jugs, 5-gallon pails, 55-gallon drums, and 275-gallon totes.

  • Certified by the EPA for “Direct Release” into the environment.
  • Enhances the efficiency of Oil Water Separators and Oil Content Monitors.
  • Degreases engine room and OWS operations.
  • Improves accuracy of OCM readings.
  • Assists with federal compliance assurance.
  • Certified as an EPA Safer Choice product.
  • Qualifies for direct release into the environment.
  • Recognized for top cleaning performance.
  • Contains No VOC’s; No NPE’s; No Solvents; No Phosphates or Phosphorus-bearing
  • Eliminates toxic residuals that are common with other degreasers.
  • Contains no carcinogens or reproductive toxicants.
  • Quick and efficient – 2 to 3 minutes of direct contact cleans with remarkable results.
  • Saves using costly bilge servicing companies.
  • Eliminates worker exposure injuries.
  • Non-corrosive; safe for use on plastics, fiberglass, and metals.
  • Will not attack or fade paint.
  • Eliminates toxic residuals that are common with other cleaners.
  • Not regulated – no hazmat shipping fees.

How to Use L-44 OSD

L-44 OSD was specifically formulated to provide excellent degreasing performance for engine room cleaning chores with a unique focus on enhancing OWS operations. L-44 OSD is tailored for compatibility with OWS units to increase processing capacities and enhance OCM accuracies.

We suggest a starting dilution of 1 part product to 5 parts water for heavy soil, and for regularly cleaned surfaces, 1 part L-44 to 9 parts water. The 9:1 ratio is equal to 1-quart of L-44 in a 2 ½ gallon Hudson-style pump sprayer. Thorough saturation for 2-3 minutes will provide the best results, followed by a final rinse with pressurized water.

Oily Water Separator Safeties

For over two years, with the cooperative assistance and feedback from maritime companies using L-44 OSD, the formulation was finalized, presented to the EPA, certified “Safer Choice” as of May of 2018, and qualifies for “Direct Release” into the environment.

With our EPA certification now in hand, we are free to pursue the VGP Aquatic Toxicity and Biodegradability certifications, as well as the Ocular Exposure Study that we have for all other products bearing our L-44® U.S. Patent Office Registered Trademark.

Enhance OWS Efficiency Today

If you’re ready to safely degrease and clean your engine room and take back control of your OWS efficiency and costs, high-performance L-44 OSD is the answer. For other vessel cleaning and engine degreasing, be sure to look at our other L-44 products, such as ECD.

Contact us today to order your first shipment and be sure to ask about our special pricing for larger quantities and our convenient automatic reordering.  855-638-8661


*For more in-depth information on OWS and OCM compliance, The International Maritime Organization has published guidelines highlighting particular chemistries detrimental to OWS operations, as well as simple tests mariners can use to determine the impact various degreasers may or may not have on oil separation.

SDS for L-44® OSD Degreaser

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What People Say

  • “Our company enjoys a very special supplier relationship with the Henry A. Petter Supply Company of Paducah Ky. To have our L-44® products associated with this historic and respected 105 year service provider to the river and marine industry is a an enormous privilege and advantage for our company. We are humbled for our association with Petter’s known reputation in the industry”

    Henry A. Petter Supply

  • “Thanks again for the opportunity to test your L-44® degreaser in our harbor fleeting operations. I now see why you had enough confidence in your product to offer a free sample for testing. Boy, were we pleased with the results! It’s nice to see a degreaser that not only cleans well, but also one that is safe for our employees and our equipment. Thanks again for opportunity to test your degreaser.” You now have a new happy customer!

    Terry F. Ferebee
    VP Vessel Operations, Helena Marine Service, Inc.

  • “I wanted to take a minute to thank you and Custom Compounders for putting out the L44ECD degreaser. Our crews use your degreaser on a daily basis and feel that it preforms very well. As the manager of our facility I appreciate the fact that your degreaser is user friendly, environmentally friendly, and meets or exceeds our government standards. I regularly pass the information on L44 along to others that we work with in the industry including fuel and oil suppliers.”

    Karl Berthelot
    Manager BMI Ste. Gen.

  • “I have worked for Luhr Bros. Inc. for 26 yrs on the boats and in their office. I came in the office in 1996 as a Safety Manager. We have been using the “L-44 ECD” Degreaser for about 4 yrs. From my perspective as a Safety Professional, the L-44 “ECD” Degreaser we are using is better than any other degreasers we have used by far. With “L-44 ECD” Degreaser we have an environmentally safe product, and no crew members having to attend medical facilities due to being burned by direct skin contact. Also it does a great job cleaning our engines and not fading the paint job. I encourage all the river companies to give it a try.”

    Bill Klingel
    Luhr Bros Inc. Marine Division

  • “We enjoy an honored privilege for the opportunity extended our company by Joe Brantley of AEP River Operations to have L-44® ECD Degreaser evaluated as part of their corporate “Go Green” mission aboard the mv. Donna Rushing. We are uniquely indebted to AEP, and for the detailed efforts of Rob Korte and Jim Wilson for their testing reviews of L-44® ECD on multiple tugboats of the AEP fleet."

    Project Go Green

  • “I have been using degreasers for many years and have never had the quality of degreaser that I am now using with the L-44 ECD. It reduces the amount of time I have to spend in the engine room cleaning which allows me more time to concentrate on my other duties. The younger generation of engineers are going to be spoiled by using a higher quality of degreaser than we had to use in the past. They will spend less time cleaning and no burning or skin irritation when it comes in contact with your skin.”

    Rick Myers, Chief Engineer, M/V Twyla Luhr