Industrial drainage equipment and maintenance

Industrial drainage assets and maintenance

Guidance on common industrial drainage assets, what they collect and the factors that affect inspection, cleaning and maintenance.

Technical guidanceSources and further reading

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28 reference records · 5 detailed guides

Identifying industrial drainage assets and maintenance needs

Oil separators, silt traps, catchpits and attenuation systems do different jobs. The maintenance approach depends on the asset installed, what drains to it and where the system discharges.

  • Asset details: manufacturer, model, capacity and drawings, where available.
  • Drainage duty: the area or process served and the oil, residues, sediment or other contamination it may receive.
  • Maintenance history: previous emptying or inspection, reported defects and recurring problems.
  • Access and discharge: cover locations, connected drains, outlet arrangement and known discharge destination.
Technical sources for this library

The references below support the drainage, product and pollution-control information used in these guides. Manufacturer literature is specific to the product or system named and is not a specification for an unidentified installation. Regulatory guidance should be read within the jurisdiction and scope stated by the source.

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Separation equipment

Oil-water separators and maintenance

What oil-water separators retain, when maintenance is needed and what should be checked before the unit returns to service.

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Maintenance notes
Asset
Oil-water separator / interceptor
Retained material
Free oil and settled material, depending on design
Key records
Model, capacity, alarm and maintenance instructions
Do not assume
A separator treats every dissolved or emulsified contaminant
  • Separator model and drainage plan
  • Fuel or other substances handled
  • Alarm, spill and maintenance history
  • Access and internal component details

Pollution prevention for businesses - GOV.UK

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Published by Industrial Drain Cleaning. Sources checked 12 September 2026. Editorial policy.

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Drainage maintenance

The maintenance needed depends on the asset, what drains to it, access and its condition.

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