This three-piece disposable kit consists of a transparent water inlet pipe, a rectal speculum, and a corrugated outlet pipe, and has been designed to be used with a Colon Hydrotherapy Unit in Colon Hydrotherapy treatment sessions. All three items are made from hygienic materials. The rectal speculum is designed according to human anatomy and is burr-free and seamless. As a result, the highest level of comfort is achieved for the patient and physician during treatment sessions.