A method of providing an automatically refreshed water supply for pets is provided by diverting the water from water supply of a toilet to a water dispenser accessible to the pet and returning excess water to the toilet. The water may be diverted from the flush cycle of a toilet to an exterior dish which fills to a predetermined level and then overflows into the toilet. The invention provides an adapter for a toilet system to create an automatically refreshed water supply for pets which comprises means to divert water from each flush cycle of a toilet to an exterior dish which fills to a predetermined level and then overflows into the toilet, and alternatively a mechanism for triggering the replacement water flow by sensing of the motion or weight of the pet. Thus the system can be pet-triggered for the toilet flush and/or flow of replacement water to the pet dish, or continuous water flow as long as the pet is detected.
