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How to Change Basin Waste Fitting | Mastering the Art of DIY [2024]


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A basin waste fitting might seem like a small component in your bathroom or kitchen, but its proper functioning is crucial for the smooth drainage of water and preventing potential leaks. Over time, wear and tear, as well as changes in design preferences, may prompt the need for a basin waste fitting replacement. 

Whether you’re a seasoned DIY enthusiast or a beginner looking to tackle a home improvement project, learning how to change a basin waste fitting is a valuable skill that can save you money and enhance the functionality of your sink.

In this guide, we will walk you through the step-by-step process of changing a basin waste fitting. From understanding the different types of waste fittings available to selecting the right tools for the job, we’ll provide clear instructions to help you complete this task. 

By the end of this tutorial, you’ll gain the confidence to undertake this project yourself, ensuring your basin operates efficiently and remains free from potential plumbing issues. Let’s dive in and explore the essential steps to master the art of changing a basin waste fitting.

How to Change a Basin Waste: Before You Begin

Before delving into the realm of DIY plumbing, it’s crucial to ensure that you possess the right type of drain tailored to your specific sink. The choice between a slotted or non-slotted drain hinges on the presence or absence of an overflow in your sink. To assist you in seamlessly replacing your sink drain, follow this comprehensive step-by-step guide:

Basin Waste Removal Tools and Materials

Ensure you have the following tools and materials at your disposal:

  • Sealant gun
  • Hexagonal nut
  • Washers
  • Silicone sealant
  • Cloth
  • Adjustable spanner
  • Bucket

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Disassemble the Old Waste

If you are replacing an old waste, disassemble it carefully, noting the orientation of the parts.

Apply Silicone Sealant

Apply a bead of silicone sealant around the opening of the plug hole to create a watertight seal inside your basin.

Fit the New Waste

Insert the new waste into the hole, ensuring any slots are pointed towards the overflow if applicable.

Apply the Second Bead of Silicone

Apply a second bead of silicone around the thread before adding a washer.

Secure the Hexagonal Nut

Screw on the hexagonal nut tightly and wipe away any excess silicone with a cloth.

Install the Basin

Now, you can install your basin following the manufacturer’s instructions.

Refit the Trap and Check for Leaks

Reattach the trap and carefully check for any leaks.

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How to Fit a Basin Waste

Shut Off Your Water

Before beginning any plumbing work, turn off your water supply at the mains to avoid potential flooding.

Remove the Old Waste and Trap

Loosen and remove the old waste and trap using pliers and a screwdriver if necessary.

Detach the Basin Waste

Unscrew the hexagonal nut securing the waste and remove the old waste, ensuring that no silicone residue.

Install the New Basin Waste

Fit the new waste into the basin, seal it with silicone, and secure it with the hexagonal nut. Reattach the trap and check for leaks.

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How to Fit a Basin Waste

A basin waste is an essential component that connects your basin to a waste pipe, allowing water drainage or filling. Follow these steps for a hassle-free installation:


  • Turn off the water supply.
  • Ensure the basin is dry.
  • Remove the old waste and trap.

Insert the New Basin Waste

  • Place the new basin waste into the designated slot.
  • Align the waste properly, especially for slotted wastes with overflows.

Optional Silicone Application

  • Apply silicone around the waste’s thread for a watertight seal.
  • Follow manufacturer guidelines on silicone usage.

Reattach the Trap and Test for Leaks

  • Screw on the washer and hexagonal nut securely.
  • Reattach the trap and check for any leaks after turning the water supply back on.

And Read: How to Seal a Bath with a Large Gap

Pop-up waste fitting instructions

Whether you’re a seasoned DIY enthusiast or a first-time plumber, these easy-to-follow guidelines will ensure that you have your pop-up waste fitting up and running in no time.

Gather Your Tools and Materials

Before diving into the installation process, gather the tools and materials you’ll need. You’ll typically require a wrench, pliers, a screwdriver, plumber’s tape, and of course, your shiny new pop-up waste fitting kit.

Read the Manufacturer’s Instructions

Every pop-up waste fitting can be slightly different, so take a moment to read through the manufacturer’s instructions included in the kit. This will provide you with specific details and any unique steps needed for your particular model.

Position and Prepare the Sink

Place a towel or bucket under the sink to catch any water that may drip during the installation process. This will keep your work area clean and prevent any potential mess.

Remove the Existing Drain

If you’re replacing an old drain, use a wrench to loosen and remove it. Ensure that the area around the drain is clean and free from any debris.

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Apply Plumber’s Tape

Take a small amount of the plumber’s tape and wrap it around the threads of the drainpipe. This helps create a watertight seal and prevents any leaks.

Install the Pop-Up Assembly

Insert the pop-up assembly into the drain hole from the top side of the sink. Underneath the sink, secure the assembly in place by tightening the nut. Use pliers to ensure a snug fit, but be cautious not to overtighten and damage the components.

Connect the Rod and Stopper

Slide the pivot rod through the back of the drainpipe and connect it to the lift rod on the pop-up assembly. Adjust the length if necessary to ensure smooth operation. Next, attach the stopper to the pivot rod.

Test the Pop-Up Mechanism

Before declaring victory, give the pop-up mechanism a test run. Open and close the stopper to make sure it moves freely and seals the drain properly.

Check for Leaks

Turn on the water and check for any leaks around the drain. If you notice any, double-check the connections and tighten them as needed. Wipe away any excess water with a towel.

By following these steps, you can effortlessly change or fit a basin waste, giving your bathroom a functional and aesthetically pleasing update. Remember to refer to the manufacturer’s guidelines and warranty information for optimal results.

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How to Fitting Sink Waste Silicone

Efficiently fitting sink waste silicone is crucial for maintaining a leak-free and hygienic kitchen or bathroom. This crucial step ensures a watertight seal and prevents leaks, contributing to the overall functionality and longevity of your sink.

Whether you are a seasoned DIY enthusiast or a novice tackling a home improvement project, understanding how to properly fit sink waste silicone is key. In this guide, we will walk you through the process step by step, ensuring you achieve a professional and secure fit.

Gather Your Materials

Before diving into the fitting process, it’s essential to gather all the necessary materials. Here’s what you’ll need:


  1. Silicone Sealant: Choose a high-quality, waterproof silicone sealant suitable for plumbing applications.
  2. Plumber’s Tape: Also known as Teflon tape, this helps create a secure seal for threaded connections.
  3. Wrenches: Adjustable wrenches for tightening and securing nuts.
  4. Plunger: In case you need to clear any clogs during the installation process.
  5. Bucket: To catch any excess water during the removal of old components.

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Remove the Old Sealant and Waste

Before applying the new silicone, you need to remove the old sealant and waste components.


  1. Turn Off Water Supply: Locate the shut-off valves under the sink and turn them off to cut off the water supply.
  2. Remove the P-Trap: Using a wrench, loosen the nuts on both ends of the P-trap and remove it. Empty any water into the bucket.
  3. Disconnect the Waste Pipe: Loosen the nuts connecting the waste pipe to the sink drain and remove the old waste pipe.

Clean and Prepare the Surfaces

Proper preparation ensures a strong bond between the sink and the silicone sealant.


  1. Clean Surfaces: Use a mild cleaner to remove any residue from the sink and waste components. Ensure the surfaces are dry before proceeding.
  2. Apply Plumber’s Tape: Wrap the plumber’s tape around the threads of the waste pipe to create a tight seal.

Apply Silicone Sealant

Now comes the crucial step of applying the silicone sealant.


  1. Cut the Nozzle: Cut the tip of the silicone sealant nozzle at a 45-degree angle to achieve a smooth and controlled application.
  2. Apply Silicone: Run a bead of silicone around the top edge of the sink drain opening.
  3. Insert Waste Pipe: Insert the waste pipe into the drain opening, ensuring a snug fit.
  4. Tighten Nuts: Use wrenches to tighten the nuts on both ends of the waste pipe, securing it in place.

Test for Leaks

After fitting the sink waste silicone, it’s crucial to test for any potential leaks.


  1. Turn On the Water Supply: Gradually turn on the water supply and check for any leaks around the waste pipe and connections.
  2. Inspect for Tightness: Ensure all nuts and connections are tight and secure.

Also Read: Why is Copper Better than Iron for Water Pipes

How To Remove A Stuck Basin Waste

Ah, the joys of homeownership—until you find yourself staring at a basin waste that just won’t budge. Fear not! In this guide, we’re going to unravel the mystery of a stuck basin waste together, sprinkling in a bit of humor and a lot of practical advice. So, grab your tool belt (or at least a good attitude), and let’s get that sink draining smoothly again!

Understanding the Problem: Imagine your basin waste as the rebel of the sinking world, holding onto its post for dear life. It might be rust, minerals, or a previous DIY job gone wrong. Knowing the enemy helps you plan your attack, so let’s figure this out.

Assessing the Situation: Take a moment to evaluate the situation. If it seems like a simple fix, go ahead, DIY superhero! But, if you’re feeling a bit overwhelmed or have a sinking feeling (no pun intended), it’s okay to call in the professionals. Your sanity and plumbing are worth it.

Tools You’ll Need: Before we embark on this plumbing adventure, let’s gather our troops—err, tools. Adjustable wrench, check. Pliers, check. Pipe wrench, double-check. Bucket (for something other than tears), and maybe a plumber’s snake for good measure.

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Step-by-Step Removal Process:

Turn off the Water: Think of it as hitting the pause button on a particularly stubborn drain drama. Shut off the water supply, so you don’t end up in a wet sitcom.

Remove the Trapped Water: Grab a bucket and play hero by rescuing any trapped water. A dry workspace is a happy workspace!

Loosen the Locknut: Locate the Locknut, the gatekeeper of your basin waste. With your trusty adjustable wrench or pliers, channel your inner superhero strength and turn that locknut counterclockwise.

Apply Lubricant: Stuck locknut? No problem! Introduce it to some penetrating lubricant and let them chat for a bit. It’s like therapy for plumbing parts.

Use a Pipe Wrench: If the locknut is playing hard to get, introduce the pipe wrench for a bit of tough love. Turn it counterclockwise, show that locknut who’s boss, and don’t be afraid to flex those muscles.

Remove the Basin Waste: With the locknut conquered, it’s time to pull out the basin waste. Give it a gentle wiggle and a motivational pep talk if needed.

Also Read: How to Prevent Outdoor PVC Pipes From Freezing

Conclusion: How to Change Basin Waste Fitting

Changing a basin waste fitting might not sound like the hero of household chores, but trust me, it’s like giving your sink a superhero cape. Picture this: you, armed with a wrench and a can-do attitude, facing the tangled mess of pipes under your sink. It’s a bit like untangling spaghetti but with more triumph at the end.

Now, as you bid farewell to that leaky old fitting, there’s a little victory dance waiting for you. It’s not just about nuts and bolts; it’s about showing your sink who’s boss. The new, shiny waste fitting isn’t just an upgrade; it’s a symbol of your DIY prowess.

So here’s a virtual high-five to you—the unsung hero of your plumbing adventures. In the quiet moments under the sink, you become the plumber, the fixer-upper, the maestro of your household. Tightening those bolts isn’t just about stopping leaks; it’s about stopping doubt and saying, “I’ve got this!”

Cheers to the everyday victories, the small wins that make us feel like masters of our homes. With every twist of the wrench, you’re not just fixing a pipe; you’re fixing your day, one turn at a time. Here’s to you, the basin waste-fitting conqueror, turning household challenges into success!

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