I have a megaflow overflow and am having problems plumbing the drain with PVC. I have not been able to find a connector to fit the provided bulkhead. I've connected 1" and 1 1/4" Flex PVC to the bulkhead and both have leaked (Note, Flex PVC does not screw on). I attributed it to the fact that they do not go up all the way over the bulkhead fitting. I used 1 1/2" Flex PVC and this fit snugly over the bulkhead and solved the leaking problem. My real problem is that I want to use PVC. PVC will allow me to connect a Tee and a ball valve to diver some of the water to another area within the sump. AGA recommends using flex tubing on the returns. Has anyone connected PVC to the megaflow drain and if so, how?