On Mon, 05 Nov 2012 22:25:37 -0500, Wes Groleau wrote:

You have water higher and you expect it to ignore
an opportunity to get lower?

Hmmm... the water goes lower all the time.

Otherwise, I'd have no water in my garden hoses.

It's the OPPOSITE direction that the check valve is for.

However, I can't imagine water ever climbing that high UP from the garden
hose into the water tanks on the other side of the check valve.