Amazingly simple design of  automatic drinker, suitable for poultry and most aviary birds, (but not parrots due to it being made of plastic).

As water is taken from the bowl it opens a valve which lets it top up from a reservoir (not supplied) until the weight of the water closes the valve again.

Simple and easy to use.  Fantastic piece of kit at amazing value.

A gravity feed header tank will need to be installed by the user.