The uploaded datasets represent the experimental data of the Two-Reservoirs test and the Constant Head Permeability Test, both described in details in the paper "A novel semi-analytical (inertial) solution for determining permeability of highly pervious porous materials using the two-reservoir laboratory setup" and in the corresponding uploaded pdf document "FStanic_et_al_SupportingInformation2.pdf". Data for the Two-Reservoirs test contain information about the water level values Π1 and Π2 in connected Reservoirs 1 and 2, respectively, and times when the corresponding values are captured, while data for the Constant Head Permeability test contain water level values recorded in Piezometer (Π12) and the corresponding water flux values vs. Also, in the document "FStanic_et_al_SupportingInformation1.pdf" are presented some technical details related to the experimental apparatus developed in this work, that can be helpful for researchers trying to conduct similar test.