[flybouy]

Originally Posted by Bbouch84

Good question. Well i braved it and blew air into the line at at a low psi and no movement at all. Other than that i dont know. I figured it would spray and use some water pretty decently but the check valve was even dry when i took it off the line before my tests.

The easiest way to "test" IMO is to get a clear connector and place it between the 3" dump line and the hose. Drain the tank. Turn the water supply for rinser on and let in run for a min or two. Go look at the clear section and if water is flowing then it's working, if not then my first guess would by John's "pinched water line" theory.