Dyson DC33 Upright Pre-Filter Assembly CMMR-QD and door frames

and door frames

Confirm your connection size before ordering so it seats securely and the turbine spins freely

Confirm your model before ordering to be sure of the correct fan

Replacing just the hose blank restores a sealed air path and full airflow while letting you keep the original fittings you already own

The Level 1 filter in ProTeam's exclusive Four Level Filtration system

Dyson DC33 Upright Pre-Filter Assembly CMMR-QD and door framesThe Dyson DC33 pre filter assembly is a replacement pre motor filter for the DC33 upright and related models. It mounts ahead of the motor, trapping fine dust that gets past the cyclone before that air reaches the motor. A pre motor filter loaded with dust restricts airflow, which raises motor temperature and cuts suction, and can eventually trip the thermal shutoff. Fitting a clean assembly protects the motor and brings suction back to full. Fits: