if you mentioned about the ceiling height for toilet, we then surely not want to raise the level, especially don't want to have 2100 ceiling height. i do not understand why would you raise it?is it mean PJC set the level wrong or what? we set the water level at 3.36, that's why we set the deck level 100mm above, 3.46, not 3.56. again, if you want to raise level for the deck, then you should RAISE ALL LEVEL, and we do not want to have additional cost because of this issue.