When two or more persons are associated by agreement in the use of a ditch, flume, pipe line, or other conduit for the conveyance of water, or who are using such ditch, flume, pipe line, or other conduit, or any part thereof, for the irrigation of land or for any other lawful purpose, to the construction of which they or their grantors have contributed, he is liable to the others for the reasonable expenses of maintaining and repairing the same, and of distributing such water in proportion to the share to which he is entitled in the use of the water.
SOURCE: CC ‘842.