Originally Posted by
speedball1
You have a blockage in the horizontal drain line located in the wall.
As a repair plumber I have never recommended using harsh chemicals. in your drainage system. Besides they only seem to work in TV commercials and when you try to remove the water you could burn your hands or damage your eyes so use extreme caution and safety goggles when removing the trap.
The solution would be to remove the trap and send a snake up into the wall.(see image) You'll hit a bend about 8 inches in but once around that you'll only have 6 more feet to put out. Flush with a tub full of hot water. good luck, Tom