The present invention relates to an in-line system of mini sprinklers, comprising a conduit (215) formed by continuous extrusion and fitted for a liquid flow under pressure through it； and a plurality of mini sprinklers units (235) embedded within said conduit (215) during its manufacturing while mounted on the inner surface area (240) of said conduit (215) and located along its length at given gaps between them； and wherein each of said mini sprinklers units (235) is coupled to flow of liquid from said conduit (215)； and comprises a mobile liquid distributing assembly (245) movable through an opening (220,225,230) in said conduit (215), such that when liquid's pressure in said conduit (215) increases, said liquid distributor moves and protrudes beyond the outer surface area (250) of said conduit (215) in order to sprinkle said liquid outwards of said conduit (215).
