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How to Replace a Laundry Sink Drain Pipe: A Step-By-Step Guide

Not sure how to replace a laundry sink drain pipe? Before we dive it, it’s always best to let a professional handle jobs like these. If you have no experience replacing pipes, call a local plumber.

Often, your laundry room serves as the unsung hero of your household, handling a wide range of tasks that contribute to your home’s smooth functioning. One key component in this room is the laundry sink, particularly its drain pipe, which may need replacement over time due to wear and tear. 

This article will guide you through the process of replacing a laundry sink drain pipe, making this seemingly complex task a breeze. All you need are some basic plumbing tools and a little patience!

Step 1: Gathering the Necessary Tools

Before you dive into the task, ensure you have the following tools handy:

  • Pipe wrench
  • Hacksaw
  • PVC primer and glue
  • Replacement PVC drain pipe
  • Teflon tape
  • Replacement sink drain assembly

These items can be easily found at your local hardware store.

Step 2: Preparing for the Task

Begin by turning off the water supply to the sink to avoid any accidental spills. Clear the area beneath the sink, providing yourself with ample workspace.

Step 3: Removing the Old Drain Pipe

Using your pipe wrench, unscrew the coupling that connects the drain pipe to the sink drain assembly and the waste pipe. This will free the drain pipe, allowing you to remove it. In some cases, due to age or rust, the pipe may be challenging to unscrew. If so, the hacksaw can come to your rescue; use it to cut the pipe near the coupling points.

Step 4: Cutting and Fitting the New Drain Pipe

Once you’ve removed the old pipe, measure its length and diameter. This will guide you in cutting the replacement PVC pipe to the required size. A snug fit is essential to prevent leaks. With your new pipe cut to size, apply PVC primer and glue to the ends, connecting it to the sink drain assembly and the waste pipe.

Step 5: Installing the New Sink Drain Assembly

If your sink drain assembly also requires replacement, unscrew the old assembly from the sink. Apply a layer of Teflon tape around the threads of the new assembly to ensure a secure and leak-proof fit. Screw the new assembly into the sink hole.

Step 6: Reconnecting the Drain Pipe

Finally, connect the new drain pipe to the sink drain assembly and the waste pipe, ensuring a tight fit with the aid of your pipe wrench.

Step 7: Checking for Leaks

Now that everything is in place, turn on the water supply and check for leaks. If water is dripping from any of the connections, tighten the couplings a bit more.

Step 8: Wrapping Up

Once you’re confident that there are no leaks, your new drain pipe is officially installed and ready for use.

Need Help? Call on MET Plumbing!

There you have it – an easy-to-follow guide for how to replace a laundry sink drain pipe. Armed with a little knowledge and the right tools, you can tackle this project and keep your laundry room in top shape. 

However, remember that if you ever feel unsure or uncomfortable during the process, it’s always best to call in a professional plumber. It’s better to be safe than sorry when dealing with home maintenance tasks.

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