Dennis DF series

The Dennis DF series was a range of heavy-duty fire engine chassis produced by Hestair Dennis (later Dennis Specialist Vehicles) from 1979 to the early 1990s. Based on the Dennis RS/SS series, the DF has a 16260 kg gross vehicle weight, and was produced primarily as a base for turntable ladder appliances or tanker units carrying either foam or water.

The DF could be offered in 'Firebird' or 'Waterbird' specification. The 'Firebird' variant could carry up to 1000 impgal of water, while the 'Waterbird' variant could carry 1800 impgal of water.

Operators
Turntable ladder appliances on the Dennis DF chassis were sold to a number of fire brigades in the United Kingdom, including the Tyne and Wear Metropolitan Fire Brigade.

The DF was also sold to fire brigades in Hong Kong, the Middle East and Kenya. DF135s were also exported to New Zealand for use as pump tenders in the New Zealand Fire Service, with some being built with Mills-Tui bodywork.