Suction filter bottle

The filter bottle has a branch pipe welded to the lower end (shoulder) of the bottleneck, which is used to connect the air pump or mechanical pump. A filter funnel (or sand core crucible) is placed at the mouth of the bottle. The liquid funnel that needs to be filtered uses an air pump to create a pressure difference and is filtered into the green bottle. It is suitable for filtration of small-volume liquids at a time.