Switching-type water saving valve

A switchable water-saving valve, comprising:

• a water inlet substrate including a housing and a water inlet portion, the housing has a ring-shaped body with external threads, the water inlet portion is fixedly arranged in the housing and has at least one water inlet and at least one water outlet extending through the water inlet portion, and the at least one water inlet is in fluid communication with the at least one water outlet;
• a flow channel substrate having an annular body, a plurality of guide holes is arranged circumferentially around the flow channel substrate at intervals and extends through the flow channel substrate, and the guide holes in fluid communication with the at least one water outlet;
• a switch holder having an annular body and rotatably positioned in the housing, the switch holder has a top surface and a bottom surface, and a plurality of first water flow holes and a plurality of second water flow holes are arranged circumferentially around the top surface at intervals and extend through the top surface;
• an aerator holder having an annular body, wherein the aerator holder is positioned in the switch holder and forms a gap between the aerator holder and the switch holder, and a grid of water outlet holes is formed in a bottom surface of the aerator holder, the water outlet holes in fluid communication with the plurality of first water flow holes;
• the switch holder is rotatable to a first position in which the plurality of first water flow holes is aligned with the plurality of guide holes respectively, and water flowing into the plurality of guide holes flows through the plurality of first water flow holes and out of the water outlet holes;
• and
• the switch holder is rotatable to a second position in which the plurality of second water flow holes is aligned with the plurality of guide holes respectively, and water flowing into the plurality of guide holes flows out of the plurality of second water flow holes.