A fluid pump adaptor arranged to be fitted to an opening in an otherwise closed containing fluid. The fluid pump adaptor includes a body (14) having a first fluid passage (22) which extends therethrough and is arranged to extend into the container and below the level of the fluid inside the container, and a second fluid passage (24) extending through the body (14) and opening into the interior of the container. Pressurized fluid from a source of pressurized fluid external of the fluid pump adaptor being delivered through the second fluid passage (24) and into the container so as to force the level of the fluid inside the container downwardly as fluid passes upwardly through the first fluid passage (22) and out of the container.
