Water Drain, Bathroom Sink, Plumbing. Flat Vector Icon illustration. Simple black symbol on white background. Water Drain, Bathroom Sink, Plumbing sign design template for web and mobile UI element. Water Drain, Bathroom Sink, Plumbing. Flat Vector Icon illustration. Simple black symbol on white background. Water Drain, Bathroom Sink, Plumbing sign design template for web and mobile UI element.