In this note, we prove that if  is a finitely accessible additive category, then for every object  there exists a pure monomorphism from A to a quasi-product of indecomposable pure injective objects in  This quasi-product is, indeed, a flat cover of direct product of these indecomposable pure injective objects. Our method is to embed a finitely accessible category into a locally finitely presented Grothendieck category with enough projective objects.