AC Servicing / Cleaning Cover Bag also called an AC wash bag
It's not just rubber — it's usually made of thick waterproof PVC / tarpaulin material.
What it's used for
*1. Catch dirty water + debris*
- You hang it under the indoor evaporator unit of a split AC
- When you spray/pressure wash the coils and blower to remove dust and mold, all the dirty water drains into this bag
- Keeps the wall, floor, and furniture from getting wet and dirty