Brick DIY toilet in plumbing

July 13, 2017Blog Standard

Rough-in plumbing refers to the separation of drains and supply lines as you put them, but before installing clamps, valves and other fittings. In essence, rough in plumbing is the plain outline of plumbing. When installing a vanity, there are rough in three pipes: the drain and two hot and cold water supply lines. Plumbing installation diagram involves measuring, cutting and a basic knowledge about plumbing in a bathroom.


  1. Measure the height of the vanity from the top of the sink to the floor.
  2. Place a tape measure on the wall where the vanity should be installed with the top of the tape against the floor. Make a mark on the wall at the height of the vanity.
  3. If you plan to install the sink drain against the wall, measure half the distance of the mark on the floor and make a second mark on the wall. If the drain will be installed on the floor beneath the vanity, make a mark on the floor in the center of where the vanity will be located.
  4. Fitting a 1 1/2-inch whole saw a drill and saw a hole in the wall or floor where the drain will be located. This is where the trap drain pipe will be located after installation.
  5. Decide whether the supply lines will enter the vanity of the wall or floor. It is also not acceptable, but the selection will depend on where to plan the execution of the pipes.
  6. If the supply lines will be installed on the wall, drill two 1-inch holes in the wall approximately 5 inches away from the drain hole. If you are installing the supply lines through the floor, drill two 1-inch holes in the floor about 5 inches on each side of the drain. The bathroom is ready for installation of pipes and fittings.

Tips & Warnings

  • Use a stud locator to check the areas where you are drilling to ensure there is no existing piping behind the wall.

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