How to Install the Plumbing for Ikea Vanities

Connecting the Drain

• 1

  Locate the drain stem on the bottom of the sink. The stem is a plastic tube that is 1.25 inches in diameter.

• 2

  Place the top of a P-trap fitting over the drain stem and turn the nut clockwise over the stem to connect the two pieces. Tighten by hand and do not use any tools, as the additional pressure may break the plastic.

• 3

  Move the straight tail piece of the P-trap to the roughed-in drain connection under the vanity.

• 4

  Place the nut on the P-trap's tail piece onto the end of the drain pipe and turn the nut clockwise until tight. This will connect the P-trap to the drain.

Connecting the Supply Lines

• 5

  Turn the ball valve on the main water line clockwise 90 degrees to shut off the flow of water to the house.

• 6

  Place one end of a standard braided water supply line over the cold water valve under the vanity. The cold water valve is typically on the right side. Turn the nut on the supply line with a wrench until tight.

• 7

  Place one end of a standard braided water supply line over the hot water valve under the vanity. The hot water valve is typically on the left side. Turn the nut on the supply line with a wrench until tight.

• 8

  Pull the other ends of the supply lines up to the back of the sink. Place the line that's connected to the cold water on the pipe threads under the right faucet handle, and place the supply line that's connected to the hot water on the left side.

• 9

  Turn both of the nuts on the supply lines clockwise with a wrench until tight. This will connect both of the water lines to the vanity.

• 10

  Turn the main water line 90 degrees counterclockwise to turn the water back on. Test both of the handles on the vanity faucet and make sure no water is leaking through the P-trap.