I am engaged in a major redesign/remodel of our second-floor master bath. The new layout calls for moving the existing toilet location about 12 feet horizontally from the present site. I plan to install a new Toto Guinevere 1.28GPF toilet.
I have a few questions:
1) What is the recommended/required drop per foot for a horizontal transit to the existing plumbing outlet site? (I have about 16" between floors.)
2) Does the existing venting need to be modified or moved to the new toilet location?
3) Other issues and/or recommendations?
Thanks in advance for any advice.


Linkback: https://www.plumbers.nz/q-and-a-toilets-wc-bidets/62/questions-about-moving-toilet-location/596/