We investigate $W$ interpretations for the ATLAS 2 TeV diboson anomalies. The roles of the unitarity sum rules, which ensure the perturbativity of the longitudinal vector boson scattering amplitudes, are emphasized. We find the unitarity sum rules an
d the custodial symmetry are powerful enough to predict various nontrivial relations among $WWZ$, $WZW$, $WWh$, $WWh$ and $ZZh$ coupling strengths in a model independent manner. We also perform surveys in the general parameter space of $W$ models and find the ATLAS 2 TeV diboson anomalies may be interpreted as a $W$ particle of the three site moose model, i.e., a Kaluza-Klein like particle in a deconstructed extra dimension model. It is also shown that the non standard-model-like Higgs boson is favored by the present data to interpret the ATLAS diboson anomalies as the consequences of the $W$ and $Z$ bosons.
