Bissell CrossWave HydroSteam Dirty Water Tank Lid for 3515, 3518 Plastiflex The fan channels airflow between

The fan channels airflow between motor stages to build suction

It caps the filter compartment and presses the filter media against its seat to keep the air path sealed

so the bean matters

balanced fan restores efficient airflow and quiet operation

Be aware that armature replacement is an advanced repair

Bissell CrossWave HydroSteam Dirty Water Tank Lid for 3515, 3518 Plastiflex The fan channels airflow betweenReplace a cracked or warped recovery tank lid with this genuine Bissell CrossWave dirty water tank lid (Part #163 4580), made for HydroSteam wet dry vacuum models in the 3515 series and model 3518. The lid seals the top of the dirty water tank so collected debris and soiled water stay contained while the machine maintains suction. A damaged or ill fitting lid lets air leak in, which weakens pickup and can allow spills when emptying. This factory