  We derive the hydrodynamic limit for two degenerate lattice gases, the
\emph{facilitated exclusion process} (FEP) and the \emph{facilitated zero-range
process} (FZRP), both in the symmetric and the asymmetric case. For both
processes, the hydrodynamic limit in the symmetric case takes the form of a
diffusive Stefan problem, whereas the asymmetric case is characterized by a
hyperbolic Stefan problem. Although the FZRP is attractive, a property that we
extensively use to derive its hydrodynamic limits in both cases, the FEP is
not. To derive the hydrodynamic limit for the latter, we exploit that of the
zero-range process, together with a classical mapping between exclusion and
zero-range processes, both at the microscopic and macroscopic level. Due to the
degeneracy of both processes, the asymmetric case is a new result, but our work
also provides a simpler proof than the one that was previously proposed for the
FEP in the symmetric case in \cite{blondel2021stefan}.
