Well. Describing our ideas without a diagram breaks down rapidly. I imagined a valve bobbing in the water, slowly elevating the water in a reservoir with each wave undulation. Thinking about it more, the problem would be an eventual equalization in pressure. But of course, I read this paragraph again and there all ways of imagining what the words are saying. If we were to really understand each other, we'd need to whiteboard.

I'm not sure that a Tesla Valve would be all that useful for tapping wave motion now that I think of it. It might not work. One way to think of it is to imagine using a one way ball valve. That has helped me in the past from ascribing too much magic or revolutionary nature to the Tesla Valve.