Where is a wax ring seal typically found?

A wax ring seal is typically found slipped over the horn in a urinal or toilet bowl. This specific location is crucial because the wax seal serves as a barrier to prevent leaks between the toilet and the flange on the floor. When a toilet is installed, the wax ring creates a waterproof seal that helps to contain waste and water, ensuring that no unpleasant odors escape into the bathroom and preventing any potential damage to flooring or subflooring from leaks.

The other locations mentioned in the options do not utilize a wax ring for sealing purposes. Under a sink, for example, may involve different types of seals or gaskets designed for plumbing connections, but not specifically wax rings. Inside a pipe connection, you would typically find various other sealing methods, such as rubber gaskets or threaded connections. Likewise, around an outdoor faucet involves different materials suited for weatherproofing but does not use a wax ring. Thus, the specific application of the wax ring in toilet installations makes this answer correct.