Patent ID: 8033301

Claim:
A water saving device comprising a hollow cylindrical body that is adapted to be attached to a water passage conduit, wherein the hollow cylindrical body includes a first plate member disposed perpendicular to the direction of the water flow passing through the water passage conduit toward the downstream side of the water flow from the side of the hollow cylindrical body on which it is attached to the water passage conduit, the first plate member having a plurality of first water passage holes formed at regular intervals with regard to each other in the circumferential direction and including a water guide member provided on the location where each of the first water passage holes is formed on the downstream side of the first plate member and being capable of guiding the water flow along the circumferential direction while the water flow toward the downstream side through each of the first water passage holes is being directed obliquely and downwardly, and wherein the hollow cylindrical body further includes a second plate member disposed in parallel with the first plate member on the downstream side of the position in which the first plate member is disposed, the second plate member having a plurality of water passage holes through which the water flow toward the downstream side through the first water passage holes is directed toward the downstream side, the plurality of second water passage holes provided on the second plate member having the total water flow cross-sectional area smaller than that of the plurality of first water passage holes.