Abstract: Single-control mixer tap for sanitary apparatuses, sinks and showers, with improved delivering water flow adjustment, includes: a base body; a ceramic disk cartridge inserted in a seat of the base body, between the body and a covering cap controlling the cartridge; a control lever to rotate the cap and the cartridge in a first plane to adjust the percentage of hot and cold water and in a second plane substantially orthogonal to the first one, to adjust the total water flow; and elements to be activated together with the control lever to reduce the maximum delivering flow from the tap. The elements and members for their adjustment are all directly associated to the control lever and positioned completely outside of the cap with the lever itself.