Home :: AdBlue Dispensing Guidance

AdBlue Dispensing Guidance

AdBlue is highly susceptible to contamination, just one single contaminated supply could be fuelling an entire fleet with contaminated product which inevitably leads to expensive repairs and possible warranty claims.

It is essential that AdBlue is handled correctly to minimise vehicle downtime resulting from SCR failure. The quality of the product can be easily influenced during the dispensing process.

The most common cause of SCR failure is due to contaminated AdBlue entering the system.

To give an example, just 5ml of oil or diesel in a 20L fill of AdBlue is sufficient to cause significant damage to the vehicles SCR system. If SCR’s are supplied with contaminated AdBlue then it will eventually render them ineffective.

As with AdBlue storage tanks, dispensing systems should be made from compatible materials.

Operators should be trained on correct handling and emergency response measures including first aid measures and spill response actions.


Avoiding AdBlue Contamination

Common causes for contamination are where fuel, oil or other contaminants have entered the system from using either dirty or non-dedicated transfer equipment, usually from using a jug or dispensing pump previously containing another product.

Additional risks exist when using equipment which is not compatible, for example a steel oil pump will corrode if used to pump AdBlue and cause deposits to clog on the porous head of the SCR.

To avoid this, ensure that all operators transfer AdBlue into the tank using dedicated equipment from a dedicated container and that the transfer system is both suitable and identified as for use with AdBlue only.


Correct equipment selection

Equipment should be engineered and certified to meet the requirements of ISO 22241-3, which ensures AdBlue dispensing systems are produced using suitable materials and are tested to ensure that the product quality is not compromised with continual use.



Do’s and Don’ts

  • Use dedicated dispensing equipment which is certified to ISO 22241-3
  • Train operators on correct handling and emergency response measures
  • Protect the system from unauthorised access


  • Do not use handling equipment which has previously contained other products
  • Do not allow anyone to handle AdBlue products without adequate training
  • Do not use product which has been in storage for long periods without testing