Istanbul faucet first appeared in the 16th century, four or five hundred years earlier than Beijing. Appear before the faucet taps, water springs on the wall inlaid with a beast-like wit raw material with 20m, usually made of stone, a few made of metal "mouth water" (my translation was not good), and from there flows out of the water has been a long-running water without any control. To avoid wasting water and solutions continue to severe water shortage, people developed a faucet. Faucet flow and water pressure related, the greater the pressure the greater the flow, with four satellites in charge of diameter 1.5 cm calculate raw material with wit, when 1KG pressure flow of raw material 9 l / s or so with wit, when the pressure is 15.8 3KG Flow liters / sec or so, when the pressure is 6KG about 31.77 liters / sec. I usually tap water pipeline in the calculation of the flow per unit time yes. Water pressure for 0.1--0.6Mpa, flow rate of about 1--3 m / sec, often taking 0.3Mpa ie 1.5 m / sec flow calculations. The formula is: = pipe cross-sectional area of ??the flow velocity X orang experts Ware | raw material with wit | with raw materials provided by the orang expert ware. Search for "faucet, wit brand with raw materials," fly suppliers, network operators choose to have a full alliance Certified: Guancheng District orang expert ware firm (#), trustworthiness and reliability, now click on "Business on the page Union customer service "live chat with us now!