Remove air from water pouch. Shocks while running shake the rucksack and water pouch. If there is air in the water pouch, you will hear the water splashing throughout your run. To avoid this disturbance, make sure that you remove the air when filling the pouch. Turn upside down and let the air go up to the tube, then suck it out. Silence once more!
do not leave water in the bladder more than 24 hours. Rince well using clean water after use and allow to dry before storing away.
empty water from bladder, clean it with dish washing liquid and rinse thoroughly, dry all elements while taking care to unscrew the tube. Do not put in dishwasher.