I meant you need to frame the opening like you would a window.
I see what you're saying about the leak I suspect mine leaks too albeit very slow. These are not supposed to be water tight but I never worried too much about it. Only when there's an outage for a long time the overflow box might be drained.
I see what you're saying about the leak I suspect mine leaks too albeit very slow. These are not supposed to be water tight but I never worried too much about it. Only when there's an outage for a long time the overflow box might be drained.