This watering system hooks onto your water faucet. It is made to operate on water pressure under 25 lbs. P.S.I. and comes with a reducing valve which will lower your pressure to the desired level. It will not operate on normal pressure. Comes with five 9 diameter bowls which give 28 of watering space. May be used for all types of poultry after 10 days of age. Contents: 25 ft. tubing, 5 water bowls, 18 hose clamps, and 1 pressure reducing valve.