Diesel Exhaust Fluid Quality Testing

DEF contamination and evaporation can leave Selective Catalytic Reduction (SCR) systems incapable of properly treating exhaust gases. This can potentially damage SCR components and contribute to downstream issues in DOC and DPF systems.​

DEF Testing and Top-Off Services ensure you’re ready for the road.

HHO field experts can test DEF quality on any vehicle, bulk tank, barrel, or tote. If necessary, they can also top off fluids with high quality Drydene DEF solutions.

DEF Quality Testing is a complementary service available exclusively to customers in HHO’s Fleet Management Program.