Hi. We are installing a toilet in an existing bathroom on the first floor. The drainage for the u bend/water seal before flowing into the manhole. Would there be any issue with the u bend if we connected the wc waste to this drain. We will be increasing the size of all the plumbing to 100ml. The u bend and the drain pipe is already 100 ml. Just concerned that the u bend shouldnt block the wc from draining properly. Please let me know your thoughts.
