The Drain pipe that is where the water go out always get stopped up. What can I do?

Answer 1

Hmmmm, tricky one to guess -- nix goot english....
So, 4 most common causes:
1) Too much toilet paper being used
2) You pour frequently oil or fat down the drain. It hardens along the way "out" and blocks the drain pipe somewhere.
3) You use too little water to flush your toilet. "Things" are not making it all the way through the system and block the "next" load.
4) Your drain pipe has a long section where it goes horizontally, and has - over time - slightly bowed down. There is where sand and other solids build up and clog the whole system.

Have fun!

Answer 2

need more info....The angles under your soffit (the bendy bit under your roof) probably aint deep enough...