The title compound, [NiCl(C12H32N6)(H2O)]Cl(3)(.)3H(2)O, has the bis(diamine)-substituted cyclic tetraamine in a planar coordination to triplet ground-state Ni-II [average Ni-N = 2.068 (3) angstrom], with a chloride ion [Ni-Cl = 2.4520 (5) angstrom] and a water molecule [Ni-O = 2.177 (2) angstrom] coordinated in the axial sites. The amine substituents are protonated and equatorially oriented. The amine groups, ammonium groups, water molecules and chloride ions are linked by an extensive hydrogen-bonding network.