Hi I have a s bend toilet installed and have put in a sbend drianage in the four inch pipe right under tiolet , I have a proplem with the water raiseing in toilet bowl then going down slowly , sometimes leaving waste. Can you help.

hi i have a s bend toilet installed and have put in a sbend drianage in the four inch pipe right under tiolet , i have a proplem with the water raiseing in toilet bowl then going down slowly , sometimes leaving waste. can u help.
How long has it been installed? If it's a older installation I have a solution for you. Back to you, Tom