How To Properly Plumb A Double Kitchen Sink

If you’re planning to install a new double kitchen sink or replace an old one, there are a few things you need to know about proper plumbing. First, you’ll need to determine the size and style of sink you want. There are a variety of sizes and styles available, so it’s important to choose one that will fit your needs and the look you’re going for in your kitchen.

Once you’ve selected your sink, you’ll need to choose the right plumbing fixtures. Most double kitchen sinks come with two drain holes, so you’ll need to purchase a drain assembly and a supply line for each hole. You’ll also need to decide whether you want a garbage disposal unit installed.

If so, you’ll need to purchase a properly sized disposal flange and supply line.

  • Place a putty knife around the perimeter of the drain to loosen and remove the old plumbers putty
  • Clean the sink flange with a rag and denatured alcohol
  • Apply a bead of new plumbers putty to the sink flange
  • Place the new sink strainer over the drain hole and press it into the putty
  • Attach the sink drain to the sink strainer with the provided hardware
  • Hand-tighten the drain nuts until snug
  • Use a putty knife to clean up any excess putty
how to properly plumb a double kitchen sink


Table of Contents

Does a double sink need two traps?

No, a double sink does not need two traps. The trap is a U-shaped pipe that is installed under the sink to prevent sewer gases from coming back up through the drain. Each sink has its own trap that is connected to the drain line.

Can 2 sinks share the same water line?

If you have two sinks in your home, you may be wondering if you can connect them to the same water line. The answer is yes, you can! There are a few things to keep in mind when connecting two sinks to the same water line, but it is definitely possible.

One thing to keep in mind is that the water pressure may not be equal at both sinks. This is because the water has to travel further to reach the second sink, so there may be a decrease in pressure. This is usually not a major issue, but something to keep in mind.

Another thing to keep in mind is that if one sink is used more frequently than the other, the water line may become clogged. This is because the water line will have a greater build-up of sediment and debris. To avoid this, it is a good idea to clean out the water line regularly.

Overall, connecting two sinks to the same water line is definitely possible. Just keep in mind a few things and you should be good to go!

How do you split a double sink water line?

Assuming you’re talking about a double kitchen sink, the process is actually pretty simple. You’ll need to shut off the water to the entire house (or at least to the sink), then remove the P-trap beneath the sink. Once the P-trap is removed, you should be able to see the drain line coming up from the main drain.

This is the line that you’ll need to split. To split the line, you’ll need to use a hacksaw. Cut the line in half, making sure that each half is of equal length.

Once the line is split, you can then install two new P-traps – one for each sink. Be sure to use plumber’s tape on all of the joints and connections to ensure a watertight seal. Once the new P-traps are in place, you can then turn the water back on and test the sink to make sure everything is working properly.

If you have any leaks, simply tighten the joints and connections until they stop.

How do you install a double sink water line?

Installing a double sink water line is a relatively easy process that can be completed in a few hours with some basic tools and supplies. The first step is to turn off the water to the house at the main shut-off valve. Next, locate the shut-off valves for the sinks and turn them off as well.

You will then need to disconnect the water lines from the shut-off valves and remove any hardware, such as faucets and aerators, from the sink drains. Once the sink drains are clear, you can begin installing the new water lines. Start by attaching one end of the new water line to the shut-off valve for the first sink.

Then, run the water line under the sink and up to the second sink. Attach the second end of the water line to the second shut-off valve. Finally, turn on the water at the main shut-off valve and check for leaks at all of the connections.

How to install the kitchen sink drain pipes

Double kitchen sink plumbing diagram

If you’re planning on installing a double kitchen sink, then you’ll need to know how to properly plumb it. This can be a tricky process, but with a little know-how and the right diagram, you can get the job done in no time. The first thing you need to do is determine where your sink will be located.

Once you know that, you can start planning the routing of your pipes. You’ll want to start by running a main line from your water supply to your sink. From there, you’ll need to branch off to each sink.

Make sure to use properly sized pipes and fittings so that everything fits together snugly. Once you have your pipes laid out, it’s time to connect everything together. You’ll need to use slip joints and pipe glue to make sure everything is properly sealed.

Once everything is connected, turn on your water supply and check for leaks. If everything is good to go, then you’re ready to start using your new double sink!


If you’re planning on installing a double kitchen sink, there are a few things you’ll need to take into consideration before you get started. First, you’ll need to make sure that the sink is properly supported. The last thing you want is for your new sink to collapse under the weight of dishes and water.

Second, you’ll need to make sure that the drain lines for each sink are properly installed and connected. If they’re not, you could end up with a big mess on your hands. Finally, you’ll need to make sure that the water lines for each sink are properly connected.

If they’re not, you could end up with water leaking everywhere. With a little planning and effort, you can easily install a double kitchen sink that will serve you well for years to come.

About Author:

Danyal is a Freelance Copywriter that has been writing for online publications including Home improvement, newsworthy blogs and even a few personal blogs. He has a passion for writing and loves to share his knowledge with everyone who wants quality information.

Leave a Comment