The following textures are licensed under the MIT and CC0 licenses by FaceDeer:

waterworks_connected_back
waterworks_grate
waterworks_inlet
waterworks_metal
waterworks_outlet
waterworks_pipe
waterworks_pipe_rivets
waterworks_pipe_rivets_offset
waterworks_pipe_rivets_offset_2
waterworks_turbine
waterworks_turbine_base
waterworks_turbine_side
waterworks_valve_off
waterworks_valve_on
waterworks_valve_seam