This article will show the correct method for adjusting the rubber bands on the dropper pump

  1. After removing the pump, lever up the housing with a screwdriver or other tool and remove the hose from the pump (do this carefully so as not to damage the pump)

2. Measure the distance between the two blue rubber bands. If it is more than 40 mm, it should be corrected to such a distance.

3. After correcting the distance between the bands to exactly 40 mm, assemble the pump.

4. When assembling the pump, align the rotating part of the head parallel to the w hoses.

4. By positioning the item in this way, it will be easier to put on the head housing.

5. Thus assembled, you can mount the head in the device.