Using nipple drinker systems is a hygienic way to assure an optimal water supply for chickens. Nipple drinker systems are suspended from the ceiling and the height can be automatically adjusted according to the growth of chickens. The drinker can also be completely raised in order to save space and to enable cleaning. Drinkers will be delivered as preassembled 3-meter-long elements making the installation in the poultry house fast. The functioning and maintenance of the drinker system are facilitated by a pressure regulator and a flush breather. The main water supply includes a pressure reducing valve, water filter, water-meter, magnet valve and vitamin dispenser as a pre-installed package.