In the title salt, 2C(8)H(12)N(5) (+)·C(6)H(8)O(4) (2-)·4H(2)O, the anion is located on a centre of symmetry. The observed supra-molecular network of the crystal structure is produced by ten different hydrogen bonds of the N-H⋯N, N-H⋯O and O-H⋯O types. One additional O-H group is not connected to an acceptor site.