Plumbing Rough In for a new laundry: What’s Involved


A “plumbing rough in” for the laundry room is a process of laying pipes that will lead water into the laundry area and those that will lead waste water into the main drain. A rough-in involves placing the pipes in the right position without actually hooking them up to water.

Why You Need a New Plumbing Rough in Your Laundry Area

  1. If you have carried out renovations in your home – You may decide you want an extra laundry room, and then you will have to create a plumbing rough in for the new laundry place. You would also have to do a rough-in if you plan on moving your laundry room.
  2. You are building a new home – When building a new home you will have to create a plumbing rough in to prepare the place where the laundry drains will be located.

What to Expect from a Plumber

  • They will locate the clean water line. In your laundry room you will have to lay pipes that will let in clean water, which you will use in the laundry process. The plumber will take time and locate the lines after which he will dig trenches from the lines to where your new laundry will be located.
  • They will locate the main drain line. Wastewater from your laundry will be let out through the lines that connect your laundry room to the main drain. In the process of locating the main drain, the plumber will employ technically advanced equipment to know the exact position of the lines.
  • They will dig slopping trenches. In order for water to flow smoothly into your laundry area, and out, the plumber will dig trenches that will slop towards the laundry drain from the clean water lines. In order to lead the wastewater into the sewerage system easily, the plumber will also dig lines that will slop towards the main drain.
  • Inside the home, they will drill holes in the walls, tiles, or other places in order to connect the pipes outside into the laundry room where the machine will be hooked up. If this is a new home, the carpenter will leave these places open for the pipes to connect.

After the rough in has been completed the codes inspector will check to make sure the pipes have been placed in the correct position. The plumber will then finish the hook up and check for any leaks or problems before allowing the carpenter to complete the walls, floors etc.