1. Fiber filter to remove large particles.
2. Fiber-type activated carbon filter to remove odor and heavy metals.
3. Hollow fiber filter to protect against bacteria and harmful substances as small as 0.1μm in size. This is a triple structure.
When you find that the amount of water being pulled through the filter has decreased per pump, it's time to change the filter. Wash the bottom of the filter occasionally - large particles are filtered by the fabric filter. The filter purifies up to 1,000 liters.