Reducing plug applied to water distribution system

The utility model discloses a reducing plug applied to a water distribution system. A water inlet is formed in one end of the reducing plug; the end surface of the water inlet is circular; the end surface of the water inlet extends downwards to form a first cavity; the bottom of the first cavity extends downwards and inwards to form a second cavity of which the inner diameter is gradually reducedfrom top to bottom; the second cavity extends downwards to form a third cavity, the bottom of the third cavity extends downwards and outwards to form a fourth cavity with the inner diameter graduallyincreased from top to bottom, the reducing plug is integrally formed, the resistance of fluid to the cavity is reduced, the flow speed is higher, and the water distribution efficiency is improved. 本实用新型公开了一种应用于布水系统的变径塞，所述变径塞一端为进水口，所述进水口端面为圆形，所述进水口端面往下延伸形成第一腔体，由第一腔体底部往下向内延伸形成内径由上至下逐渐减少的第二腔体，所述第二腔体向下延伸形成第三腔体，由所述第三腔体底部往下向外延伸形成内径由上至下逐渐增大的第四腔体，所述变径塞一体成形，流体对腔体的阻力减少，流速更快，提高了布水效率。