This sprayer is light-duty, so the "Premium" and "Professional" designations are misleading.When I started using it, it was leaking at the downstream side of the valve, where the wand attaches to the valve body. I was able to stop the leak by removing the little filter adapter that had been inserted between the valve body and the wand. Now there's no filter, but at least I am not getting chemical all over my hand.In short, the sprayer does the job it is supposed to, but I'm not confident it's going to last very long.