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Oil, Grease & Silt Building Up in Your Wash-Down Pit? Here's What to Know

6 days ago
2 min read

Commercial workshops, mechanical service centres and industrial facilities deal with more than everyday dirt. Oil, grease, sediment and wastewater can accumulate in wash-down pits, plate separators and silt traps, making regular cleaning an important part of maintaining a safe and efficient workplace.


If your business operates equipment or vehicles in areas where washing and maintenance take place, understanding how these systems work - and when they need servicing - can help prevent avoidable problems.


What Happens When Oily Waste Builds Up?


Wash-down areas can collect oil residues, grease, dirt and fine sediment washed off vehicles, machinery and equipment. These materials can settle in pits and tanks or enter systems designed to separate oil from water.


Over time, accumulated waste can reduce the available capacity of a system and interfere with its normal operation. Neglected pits and separators may also contribute to unpleasant odours, drainage problems and the risk of overflow.


Regular maintenance helps businesses identify build-up before it causes more significant disruption.


What Is a Plate Separator?


A plate separator is designed to help separate oil from wastewater before the water proceeds through the relevant drainage or treatment system. These systems are commonly used in suitable commercial and industrial applications where oily water needs to be managed.


However, separated oil, sludge and sediment still require appropriate removal. A plate separator isn't a substitute for regular inspection and cleaning.


The servicing frequency depends on factors such as the type of operation, the volume of wastewater generated and the amount of oil and solids entering the system.


Signs Your Wash-Down Pit May Need Cleaning


Not sure whether your system needs attention? Watch for these potential warning signs:


  • Visible oil or grease build-up: Residue accumulating around the pit or water surface may indicate that cleaning is due.

  • Sediment and sludge: Sand, dirt and other solids can settle at the bottom of pits and tanks.

  • Slow drainage: Reduced drainage performance may indicate a blockage or build-up that requires investigation.

  • Unpleasant odours: Persistent smells can be a reason to arrange an inspection.

  • Approaching scheduled maintenance: Keeping service records can help prevent cleaning from being overlooked.

If you notice these issues, arrange an assessment rather than waiting for a complete blockage or overflow.


Why Professional Oily-Water and Pit Cleaning Matters


Professional servicing helps remove accumulated liquid waste, oil residues and solids using equipment suited to the site and the system being cleaned.


Appropriate waste handling is equally important. Collected material must be transported and managed in accordance with applicable environmental requirements and accepted at an appropriate facility.


Sutton’s Cleaning Service provides commercial oily-water and pit cleaning services, including wash-down pits, plate separators and silt traps. The team transports collected waste to a DETSI-approved facility for appropriate treatment.


Keep Your Commercial Wastewater Systems Working Efficiently


Regular maintenance can help businesses reduce the risk of disruptive build-up, keep systems operating as intended and manage wastewater responsibly.


Whether you manage a mechanical workshop, service station or another commercial facility, a suitable cleaning schedule starts with understanding your system and how your site operates.



Need oily-water or wash-down pit cleaning on the Sunshine Coast?

Contact Sutton’s Cleaning Service to discuss your requirements.


Phone: 07 5447 6477


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