An apparatus for transporting fluid between a reservoir and a natural body cavity. The direction of flow can be in either direction. In a preferred embodiment the reservoir is fitted with a pump to advance fluid from the reservoir into the cavity. A locator forming a part of the apparatus is adapted so at least part of it is fitted through a natural orifice and retained within the natural body cavity. The apparatus includes a securing device which holds it in place on an animal during the normal cavities of that animal.