A system comprises: (a) a pipe having a first aperture； (b) a cylindrical drip emitter within the pipe having: (i) an emitter body having an outer facing in contact with the inner pipe surface； (ii) a liquid inlet section adapted to receive a liquid from within the pipe； (iii) a pressure-reducing section disposed in fluid communication with the liquid inlet section； (iii) functionally active sections 330b including the pressure-reducing section, the liquid inlet section, the functionally active sections disposed within, and longitudinally defining a longitudinal segment of the body； and (iv) at least one functionally passive section 340b, disposed on the outer facing, within the longitudinal segment； and (c) a liquid flow path fluidly connecting between the liquid inlet section and the passive section, via the pressure-reducing section, and between the passive section and the outside. The ratio of the length of the active section to the overall length of the emitter may be at least 0.85.
