Use This Laundry Sink Plumbing Diagram to Set It Up!

Not a lot of people would need to install a utility sink next to washers and dryers unless cleaning paintbrushes or sanding off worn sneakers are tasks you do frequently.

A laundry sink will also help in bathing pets and of course to soak clothes prior to actual washing. So, the usefulness is not completely gone.

Once you have the laundry sink, one complicated part might be the plumbing. That’s what I will help you with today.

I will be sharing a laundry sink plumbing diagram that you can use to set up the part easily. Don’t worry if you have no idea how to set it up, as I will also share the plumping process.

So, let’s not wait and jump into the main discussion.

Presenting The Laundry Sink Plumbing Diagram & Details!

A proper diagram of laundry sink plumbing helps to find problematic parts when one has to do repairs. In case you need one, here’s the image of the laundry sink plumbing.

Confused by the above laundry plumbing diagram that only contains numbers with no data? Then, let me explain each component and its function. It shall help you.

1 Means P-trap Pipe

Inside the laundry sink cabinet, you’ll find this pipe that looks like the letter ‘J’ right under the sink adapter.This usually does 3 main tasks which are trap filth, lessen clogs, and block sewer gas. This helps the water to drain properly.

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2 Means Washing Machine Standpipe

This part connects directly to the washing machine’s drain hose. So that the water can go in the direction of the drain system. It helps the washing machine to flow water after use.

3 Means Vent Pipe

It’s a handy part that keeps out the dirty odor from the laundry room while keeping the sewer gas out.

This component grants fresh air collecting from the outside area to keep the drainage pipe fresh with no smell that can come into the laundry room through airflow.

4 Means Sanitary Tee Pipe

This is a T-shaped pipe that helps 3 pipes connect together to go in a direction. It lets wastewater flow in a specific direction.

5 Means Pivoting P-trap Union Without Cleanout

It’s a mid-sized pipe that looks like the letter ‘S’ which connects 2 pipes so that the waste water can go to a specific side.

6 Means Laundry Sink Drain Pipe

This part sits at the end area that helps the used water to flow and escape into the drain sewer line. In most cases, the laundry sink drain pipe size is around 1-1/2” to 2 inches.

7 Means Swivel Nut with Sink Adapter

It sits under the laundry sink and usually fits the adapter to the pipe. This component can be rotated at 360° to adjust the fitting in a better way.

Laundry Sink Plumbing Setup Instructions

Laundry Sink Plumbing Setup
  • For the laundry sink plumbing setup, you need to use a screwdriver, hacksaw, tubing cutter, propane torch, and groove joint pliers.
  • Make sure the supply pipe’s water is turned off and drain the lines. For the copper supply line, you need to use a tube cutter for cutting the pipe and then fit a tee fitting onto it.
  • Next, you want to use flux and sweat the tee fitting to stay in its position. Use a piece of pipe and slip coupling for enough movements if needed. You can also go with compression fitting.
  • You need to reach the laundry tub for plumbing rough in with the washing machine. To do so just add pipe lengths. Use brass supply stub out at each supply pipe end. Use masonry screws for anchoring.
  • Use masonry screws for anchoring added supply stubs after running copper lines. Use pipe thread tape for each hose bit into the stub. A wrench will help with tightening.
  • Assemble the sink and connect stop valves. Install the faucet as well as make supply tubes connection with stop valves.
  • Run a drainpipe using a tee fitting into the drain line towards the sink. Use glue for connecting the adapter to the end of the pipe and connect the trap.
  • Finally, set up the washing machine at a level in its place. You need to connect the supply lines to the valves using pliers and screwdrivers.
  • The drain hose can drape over the laundry sink side. Use clamps for firm placement. A washing machine supply box will give a neat look in case the wall is not finished.
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Frequently Asked Questions (FAQs)

Can a sink and washing machine share the same drain?

If the sink and washing machine are close enough and share a vent, then using the same rain is fine. However, if they don’t share a vent, then you must tie their vents together before tying into the main vent stack.

What is a good depth for a laundry sink?

A good depth for a laundry sink depends on the type of activity it would handle. This is indeed one major consideration of how to install sink in laundry room. Generally, 15 inches of depth will be enough for taking large items for soaking. As well as for craft use.

What is the difference between a laundry sink and a kitchen sink?

There are structural differences between a laundry sink and a kitchen sink. Just like kitchen sinks, you may find laundry sink with cabinet but that does not mean both are the same.
Kitchen or bathroom sinks don’t come with deep tubs or wide areas. But the laundry sink needs to accommodate large items so definitely those factors are necessary.

Wrapping Up

And you can now easily use the Laundry Sink Plumbing Diagram along with the plumbing instructions for a complete setup that I provided.

Hopefully, you will be able to start using the sink in no time. However, keep in mind, that plumbing is not for everyone, and it definitely is a challenging job to do.

So, if things seem a little too complicated, don’t skip contacting a plumber who can visit your place and get the job done in no time.

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See you in the next article soon!

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