👉 Percolators are a type of filter or media that allows water to pass through it but does not allow gases to pass through it. They are commonly used in water treatment systems to remove impurities and bacteria from the water. The key characteristics of a percolator include: 1. High permeability: Percolators have high permeability, meaning they allow water to flow through them while preventing gas or solids from passing through. 2. Low阻力: Percolators have low resistance to air