venting wall mount toilet
What is the best way to vent a wall mount toilet? I am using a Grohe in wall carrier. The horizontal line will be about 12 inches below the floor level. It is a single story. From what I can tell I have 2 options. Is either option preferred or is there another option I don't see? Thank you.
1) Outlet pipe goes straight down to the main horizontal drain line under the floor and have the vent come off the horizontal pipe just upstream of the toilet connection.
2) Have the outlet pipe go at an angle and connect to a vertical pipe that connects to the horizontal line and goes up though the roof as the vent line.