Re: Can I do this w/a dehumidifier?
I like Jack's reply, and it would be a fair charge at an environmentally useful alternative. Save the water in a barrel and use it for gardening or watering the lawn. Create a water effect or, my personal favorite, create a personal trout stream. (Just thought about a lot, never actually did it)
As to the hole in your floor? Never, never, never touch a radon mitigation system, particularly in the manner as you mentioned. What you would be doing is creating an amazingly successful system for redistributing radon throughout your neighborhood and your local water supply and defeating the entire purpose of a mitigation system. And,you'd be risking serious repercussions from your local authorities if anyone ever found out. Radon is one of things that, while it can't be seen or smelled, it's serious and shouldn't be tampered with. It effects not only you and your family, but your entire community.
If I only knew what I was doing!