Laundry Room Plumbing Rough In Dimensions – Complete Plumbing Guide for You

Laundry room plumbing is typically located beside or behind a home’s laundry sink. The laundry room can be as small as a closet, but it should have ample space between 6 to 10 feet wide and 3 to 5 feet deep. It allows movement around the washer and dryer and areas for laundry baskets and other necessities.

Because of this, it is essential to know about laundry room plumbing rough in dimensions, and we are going to cover the details for you in this article.

Laundry room plumbing rough in dimensions

Laundry room plumbing dimensions need to provide enough space for the laundry appliances, water supply lines, drainage pipes, and electrical wiring.

The standard dimensions for a laundry room size are 60 inches wide by 24 inches deep. If you install a sink or a washer and dryer, these appliances will need to be factored into your dimensions.

Make sure to leave enough space for these appliances and for people to move around in the room. Additionally, you will need to consider the location of the nearest water supply and drain.

When planning your laundry room plumbing rough in size dimensions, keep in mind that the washer and dryer usually require at least 30 inches of width each. The sink should be near a window for ventilation and light.

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If you install a dishwasher in your laundry room, it is best to place it next to the sink. Remember to leave enough space around all appliances for airflow and access.

When designing your laundry room plumbing layout, these basic dimensions will help you get started:

Laundry Room AppliancesHeight (in inch)Width (in inch)
Faucet Hole Spacing18 inches on center laundry room rough in 

It is essential to plan and design the layout correctly with laundry room plumbing rough dimensions. It will ensure that your laundry room is functional and meets all your needs.

Washing Machine Plumbing Rough In

For your washing machine to function correctly, the standpipe for washing machine must be at least more than 30” from the floor and less than 8 feet high. It is essential to keep it in mind when installing your washer as it will affect where you can place that in your home.

When measuring for your washing machine rough plumbing, be sure to account for the following dimensions:

  • The washing machine outlet should be located 18” above the floor.
  • The washing machine inlet should be located 48” from the sidewall and 36” from the back wall.
  • There should be a minimum of 30” between the washing machine and the sidewall.
  • The washing machine inlet should be at least 15” from any other drain pipes, including a floor drain or sump pump.

These dimensions will ensure that your washing machine is correctly installed and functional with all of our washing machines!

If you have a top loader washer, you will need to make sure the washer drain pipes are high enough so that the water can flow freely out of the hose and down into the drainage system. The ideal height is around 30”, but if it’s challenging to reach this height, you can go as low as 24”. Just be sure that the drain hose is not hanging more than 8 feet high, as this can let the water to back up and overflow.

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However, if you have a Front Loader washer, the ideal height for the washer drain pipes is also 24”. However, since these washers are often placed in tighter spaces, the 8-foot height limit is more forgiving. Just be sure that the drain hose is not hanging more than 5 feet high, as this can also cause the water to back up and overflow.

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Frequently Asked Questions (FAQs)

What plumbing rough in do you need for a laundry room?

Supply pipes branch off in a basic laundry room to provide hot and cold water in the washing machine and the utility sink. The drain hose of the washing machine clips to the side of the utility sink, which has a P-trap that joins to a house drain line. A washing machine requires both hot and cold water and a drain.

How high do you rough in a washing machine box?

When installing a washing machine outlet box, you need to make sure that you install it at the right height. The flood level rim should be installed at 32” to 34” above the finished floor. It will ensure that any water or leaks won’t damage the surrounding flooring.

How high should washing machine drain pipe be?

For the top loader, the washing machine drain height maximum of 30 feet above the floor and less than 8 feet high. And, for the front loader, height maximum of 24 feet above the floor and less than 8 feet high.

How many receptacles are required in a laundry room?

Most codes require a minimum of one 20-amp dedicated circuit for receptacles serving laundry equipment in the laundry room.


Having the proper laundry room plumbing rough in guide is essential for ensuring that your laundry room functions correctly and is comfortable to use. Taking the time to plan will save you headaches down the road.

If you are still unsure of the ideal laundry room plumbing rough in dimensions, consult a professional or check with the manufacturer of your appliances. Doing so will help ensure that your laundry room is designed correctly and that you can use all of your appliances comfortably.

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