Used Insulating Oil Collection

Collection of used insulating oil is the first step in the reclamation or recycling link. Without it, the long term future of insulating oil reclamation in the UK could not continue at the current high level.

If you are an EOS reclaimed oil customer, you will be used to tankers or curtain-sided vehicles arriving on your site to collect used insulating oil from transformers and switchgear. This used oil or UTO, as it is generally known, then becomes the “feedstock” for the reclamation process, thus ensuring the recycling loop is properly closed.

It may be that you have a scrap transformer and the UTO will not be required to be reused as insulating oil by yourselves, in those cases do not send the oil to the scrap man, there it will be lost to the electricity supply industry forever and end up as a process or base oil. Instead, call EOS to arrange for collection and help ensure the future for recycled / reclaimed insulating oil for years to come.

The Process

Whenever insulating oil is removed from a transformer (or oil-filled switch) into a tanker or designated UTO drum, then it becomes de facto used insulating oil. In the UK this oil is collected as a “hazardous waste”, but EOS is able to take care of the appropriate paperwork for this type of waste as part of our service.

We will guarantee to collect your used insulating oil within 5 working days. Each collection is given a unique collection number and we provide yellow UTO labels (see supporting document) for you to attach to drum(s). Completing this label is vitally important as everyone in the collection chain has a “Duty of Care” to know where the used oil has come from in case of any problems during the journey to Ellesmere Port or on arrival.

Used oil will be “credited” to your account to enable you to “call off” or purchase Reclaimed Insulating Oil – in effect it becomes the feedstock for supply or Reclaimed Insulating Oil to BS148:2009.

If you would like to find out more about the collection of insulation oil, or arrange collection, please contact a member of the EOS customer service team who can arrange for an EOS engineer to visit the site, and will be happy to cover the following areas:

  • Re-delivery of reclaimed oil
  • Hold on site options
  • Mobile Processing Unit requirements (if applicable)


Can I return used oil in any container I have available?

Most definitely not. In order to minimize the risk of contamination of used oil our quality assurance procedures require that drums for collection of used oil are of a suitable type (either supplied originally containing electrical oil or as empties specifically for the return of UTO) and that drums are in a sound condition. EOS can advise on suitable containers.

Case Studies

  • Recycling insulating oil

    The customer was an aluminium company in North Wales The Aluminium company had closed down leaving approx 150,000 litres of…

Resource Links

New UTO Label

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Useful Contacts

Customer Services

Tel: 0845 6021003

Related Services


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Nos prestations de service

Grâce à notre vaste expérience du recyclage, du stockage et de la fourniture d’huile isolante (également sur place), nos clients ont l’assurance de bénéficier d’une qualité de service et de standards de qualité de haut niveau.


Nos produits

Vous trouverez chez nous de l’huile isolante neuve ou recyclée ainsi que tout un ensemble de produits complémentaires fiables.


Nos employés s’investissent pleinement dans leur travail et se feront un plaisir de vous conseiller de manière ouverte, professionnelle et en toute honnêteté.