You're going to start a facing a wall with a long pipe. Turn 45 degrees to the left, and take one step towards the red sink that is on the right corner. Now, turn left, and enter the door that is next to the water jug. Turn left again and walk to the right of those Home Depot boxes. Keep walking towards the statue of a head. Now, you should have a set of stairs going up on your left. Go all the way up the stairs. Oh no, you don't have to go all the way up, just four or five steps up and you're done.