How in the world do you attach the hose to the DE filter when you backwash? I'm doing the opening cleaning of my new (to me) pool, and am mystified as to how to attach the backwash hose to the filter. I've tried Google, but couldn't find anything helpful. All the web pages said to "attach the hose." Yes, I KNOW that, but HOW? The hose seems so much bigger in diameter than the pipe it attaches to, I'm at a loss. Any help is greatly appreciated.