An animal watering system can be used to water poultry for extended periods of time without operator attention. An upper reservoir is electrically heated with a waterproof resistance heater. A lid allows filling from the top. A four legged (metal) stand supports the reservoir above the ground. A plumbing tree connects at the bottom and has a shut off valve, an easy to clean filter and a float switch valve which keeps the water level constant in a trough located under the stand. The trough is preferably supported above ground by a (circular) base which can have its own electric heater. The float switch prevents any trough water from flowing upward into the reservoir. The plumbing tree has a hose inlet used for filling or cleaning.
