Every situation for roughing in a toilet is different, so the amount of time the installer needs to complete the rough-in varies based on the conditions. Roughing in a toilet involves completing the basic plumbing installation so that the construction process can continue.
The first step is locating and marking the toilet's position. Then cut out the drain hole and install the drain piping. Finally, install the supply line. The drain slope should be 1/4 inch per foot. Vents must have a 45 degree or steeper upward angle to prevent filling with water. Installers must check local plumbing codes to determine how many cleanouts they need and where the cleanouts must be located.