A treatment device for a drain is presented to reduce at least one of odor, insect, uric acid, and grease and oil problems. The treatment comprises a dispenser that is configured to couple a stem from a drain extending into a drain pipe. At least a portion of the dispenser is composed of the active agent and thereby dispenses the active agent. The active agent includes at least one of an insecticide, a deodorant, uric acid-consuming bacteria, and an enzyme that digests grease and oil. Thus, problems associated with drains are substantially reduced using the treatment device.
