The present invention provides a compact colon irrigation device and a method for performing human colon irrigation. The colon irrigation device of the present invention comprises at least a housing, a gravity tank to supply water by gravity, a means for filling the gravity tank with warm water, an extension tube extending vertically from the top of the gravity tank to create a required water head for providing substantially a constant gravity flow of water at a predetermined pressure, a speculum for insertion into rectum of colon for irrigation and extracting matter, a water supply line extending from the gravity tank connected with the said speculum, and a drain line connected with the said speculum. The gravity tank provides water at a pressure suitable for carrying out the colon irrigation safely.
