The $F$ and $G$ form-factors of $K_{\ell4}$ and the quark condensates are
calculated to ${\cal O}(p^6)$ in Chiral Perturbation Theory (CHPT). Full
formulas are presented as much as possible. A full refit of most of the
${\cal O}(p^4)$ CHPT parameters is done with a discussion of all inputs and
underlying assumptions. We discuss the consequences for the vacuum
expectation values, decay constants, pseudoscalar masses and
$\pi$-$\pi$ scattering.