Designed for 19L bottles. If you want to put on 5l, you will have to look for an adapter or (I made a hole in the lid from a 5l bottle, put it on the pump stem and filled it with a glue gun so that the pump did not hang out. Be sure to make an additional small hole for air in the lid or in the neck of the bottle, to compensate for pressure, otherwise, when the pump is running, the bottle will shrink due to the negative pressure inside).
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