Abstract: The invention relates to a water mixer tap, for mixing hot/cold fluid or water, having one tap body-cartridge-handle with plurality of concentric legs or tails connected to concentric ports in the cartridge/plurality of tap bodies-cartridges-handles with plurality of concentric or parallel legs or tails connected to individual tap bodies such that discharge of fluid or water from all tap bodies finally entered into a common header for all tap bodies for discharge of fluid in a mixer chamber in various embodiments of the present invention Fluid Mixer Tap.