A drain trap adaptor adapted to allow draining of a drain trap and retrieval of a material. The drain trap includes a first drain pipe having an entry portion and an exit portion, a second drain pipe extending from the exit portion and a bore disposed substantially at the exit portion. The drain trap adaptor includes a ball valve having an inlet end and an outlet end, wherein the inlet end is adapted to connect to the bore; and a container adapted to connect to the outlet end of the ball valve. The container is configured to receive the drainage trapped in the drain trap and the material at the bore upon opening of the ball valve such that the drain trap can be drained and the material can be retrieved.