A hollow cylinder intended to be inserted into the rectum for the administration of irrigation fluid from a connected colonic lavage system/unit; it may additionally be intended for use with an enema kit for the delivery of an enema solution. It is typically designed as a one-piece, moulded nozzle that may have a bulb shape at the distal end to improve retention in the rectum and a barbed fitting at the proximal end for the attachment of the irrigation/enema tubing. It may be designed for open (entry of fluid only) or closed (entry of fluid and evacuation of waste), and clinical or home-use, colonic lavage. This is a single-use device.