The fundamental problem is to
determine if the free product with amalgamation of Hausdorff topological groups
exists and is Hausdorff. This is known to be true if the subgroup being amalgamated
is central or if all groups concerned are kω and the amalgamation subgroup is
compact. In this paper a general result is proved which allows one to move outside
the class of compact or central amalgamations. Using this result it follows, for
example, that the amalgamated free product F ∗AG exists and is Hausdorff if F, G
and A are kω-groups and A is the product of a central subgroup and a compact
subgroup.