Well I have a question on how to fix a p trap from backing up and flooding the basement floor. It only does it when we use the washer when it is raining outside. So how would I fix it?

Hilton, You piggybacked onto a old thread. You didn't say but if this is a floor drain that's backing up you can snake the floor drain and clear the line.
Another way would be tom install a Flood-Guard (see image) on the floor drain. Check them out at : Flood guards for floor drains - check valve to prevent flooding from FAMOUS PLUMBING SUPPLY If it's not a floor drain click on back and tell me about it. Good luck, Tom