A breathing assistance apparatus has a humidification compartment defined within a main body and is adapted to receive a humidification chamber. A flow generator is also positioned within the main body. The flow generator and the humidification compartment are fluidly connected via a liquid containment compartment which is interposed between the flow generator and the humidification compartment. The liquid containment compartment prevents water spills from the humidification chamber from reaching other areas of the breathing assistance apparatus.