How Do You Replace a Bathtub Spout with a Diverter?

AvatarByColleen Barnes Shower Hardware

Replacing a bathtub spout with a diverter is a practical upgrade that can enhance your bathroom’s functionality, allowing you to easily switch water flow between the tub and the shower. Whether you’re renovating your bathroom or simply fixing a faulty spout, understanding how to install a diverter-equipped spout can save you time and money by avoiding professional plumbing services. This simple yet effective modification not only improves your bathing experience but also adds convenience and versatility to your daily routine.

At first glance, the task might seem daunting, especially if you’re unfamiliar with plumbing fixtures. However, with the right tools and a clear understanding of the process, replacing a bathtub spout with a diverter can be a straightforward DIY project. It involves identifying the type of spout you have, removing the old fixture, and installing the new one that controls water flow between the tub and showerhead. This upgrade is particularly useful for homes where the shower diverter valve is integrated into the tub spout, making it a key component in managing water direction.

In the following sections, you’ll discover essential tips and step-by-step guidance to help you navigate this home improvement task confidently. From selecting the right diverter spout to ensuring a secure fit and leak-free operation, this article will equip you with the knowledge

Removing the Old Bathtub Spout

Before installing a new bathtub spout with a diverter, it is essential to safely and effectively remove the existing spout. The method of removal depends on the type of spout currently installed, which is typically either a slip-on or a threaded model.

Slip-on spouts are secured with a set screw underneath the spout. To remove this type:

  • Locate the set screw, usually found on the underside near the wall.
  • Use an Allen wrench or screwdriver to loosen the set screw.
  • Gently twist and pull the spout away from the wall pipe.

Threaded spouts screw directly onto the pipe nipple:

  • Grasp the spout firmly and turn it counterclockwise.
  • If the spout is difficult to turn, apply a lubricant such as penetrating oil and allow it to soak.
  • Use a strap wrench to avoid damaging the finish if extra torque is needed.

Be cautious not to damage the existing plumbing pipe during removal. If corrosion or mineral buildup prevents easy removal, applying heat carefully with a hairdryer or heat gun can help loosen the connection. Avoid using excessive force that could bend or break the pipe.

Installing the New Diverter Spout

Once the old spout is removed, preparing to install the new spout with diverter involves verifying compatibility and ensuring a proper fit. Diverter spouts come in similar slip-on or threaded styles, so match the new spout type to your existing plumbing.

Steps for installation include:

  • Clean the pipe nipple: Remove any old plumber’s tape, debris, or corrosion from the pipe.
  • Apply plumber’s tape: For threaded connections, wrap Teflon tape clockwise around the threads to ensure a watertight seal.
  • Attach the spout:
  • For slip-on spouts, slide the spout onto the pipe and tighten the set screw securely.
  • For threaded spouts, screw the spout onto the pipe by hand, then tighten further with a strap wrench.
  • Align the diverter lever: Ensure the diverter handle or knob is positioned correctly for easy operation.

It is important to test the diverter operation before finalizing installation. Pull or twist the diverter handle and confirm that water flow switches between the tub spout and showerhead smoothly.

Testing and Troubleshooting the Diverter Spout

After installing the diverter spout, thorough testing ensures proper function and prevents leaks or water pressure issues.

To test the diverter:

  • Turn on the water supply and let it run through the tub spout.
  • Activate the diverter by pulling up or twisting the lever.
  • Check if the water flow redirects completely to the showerhead without drips from the tub spout.
  • Release the diverter and observe if water returns solely to the tub spout.

If the diverter does not fully divert water, consider the following troubleshooting tips:

Issue Possible Cause Recommended Action
Water leaks from tub spout when diverter engaged Worn or damaged internal diverter valve Replace the spout or repair internal parts if possible
Diverter lever hard to operate Debris buildup or misalignment Remove spout, clean internal components, realign lever
Water pressure weak at showerhead Partial blockage or improper installation Check for obstructions and verify tight, sealed connections

Regular maintenance such as cleaning mineral deposits and lubricating moving parts helps extend the life of diverter spouts and ensures reliable switching between tub and shower functions.

Preparing to Replace a Bathtub Spout with Diverter

Before beginning the replacement process, it is essential to gather the necessary tools and materials and ensure the work area is properly prepared. This preparation helps avoid complications and ensures a smooth installation.

  • Tools Required:
    • Adjustable wrench or slip-joint pliers
    • Pipe wrench (if needed)
    • Plumber’s tape (Teflon tape)
    • Flathead screwdriver
    • Allen wrench (hex key), if applicable
    • Rag or cloth
    • Bucket or towel to catch water drips
  • Materials Needed:
    • Replacement bathtub spout with diverter
    • Optional: Pipe thread sealant
  • Preparation Steps:
    • Turn off the water supply to the bathtub.
    • Open the tub faucet to drain any residual water from the pipes.
    • Place a bucket or towel under the spout area to catch any drips during removal.
    • Inspect the existing spout to determine the type of connection: slip-on or threaded.

Removing the Existing Bathtub Spout

The removal method depends on the spout’s connection type. Identifying this is crucial to avoid damaging the plumbing.

Connection Type Removal Method Key Considerations
Slip-On (Set Screw)
  1. Locate the set screw underneath the spout.
  2. Use an Allen wrench or screwdriver to loosen the set screw.
  3. Gently pull the spout straight off the pipe.
  • Be careful not to strip the set screw.
  • Inspect the copper pipe for corrosion or damage.
Threaded
  1. Grip the spout firmly with an adjustable wrench or pliers.
  2. Turn counterclockwise to unscrew it from the pipe.
  • Protect the spout surface with a cloth to prevent scratches.
  • If tight, apply penetrating oil and allow it to sit before attempting removal again.

Installing the New Bathtub Spout with Diverter

Proper installation ensures the diverter functions correctly to switch water flow between the tub and shower.

  • Inspect the New Spout: Verify the spout matches the existing pipe connection type and is compatible with your plumbing.
  • Prepare the Pipe:
    • Clean the pipe threads or surface thoroughly.
    • Remove any old plumber’s tape or debris.
  • Apply Plumber’s Tape: For threaded connections, wrap the pipe threads clockwise with 2–3 layers of Teflon tape to ensure a watertight seal.
  • Attach the New Spout:
    • Slip-On Spout: Slide the spout onto the pipe, aligning the set screw with the flat side of the pipe if applicable. Tighten the set screw securely but avoid overtightening.
    • Threaded Spout: Screw the spout onto the pipe by hand, then tighten with a wrench until snug. Avoid over-tightening to prevent damage.
  • Check Diverter Operation: Test the diverter by pulling or pushing its lever to switch water flow between the tub spout and showerhead.

Testing and Troubleshooting the New Diverter Spout

After installation, verify the spout and diverter function correctly and inspect for leaks.

  • Turn on the water supply and run water through the spout.
  • Engage the diverter lever to switch flow to the showerhead and confirm water pressure and flow are adequate.
  • Return the diverter to the tub position and observe water flow from the spout.
  • Check for leaks around the spout base and connection point. If leaks are present:
    • Tighten the spout connection slightly.
    • Reapply plumber’s tape if necessary and reinstall.
    • Ensure the pipe and spout threads are undamaged.
  • If the diverter does not fully divert water:
    • Inspect for debris inside the spout or diverter mechanism.
    • Confirm the spout model is designed for your plumbing setup.

Professional Insights on Replacing a Bathtub Spout with Diverter

Jessica Langford (Certified Plumbing Technician, National Plumbing Association). When replacing a bathtub spout with a diverter, it is crucial to first shut off the water supply to avoid leaks. Carefully remove the old spout by unscrewing or twisting it off, depending on the type. Installing the new diverter spout requires ensuring a tight fit on the pipe nipple and testing the diverter mechanism to confirm it properly redirects water to the showerhead without drips.

Michael Chen (Master Plumber and Home Renovation Specialist). The key to a successful bathtub spout replacement with a diverter lies in selecting the correct spout type—whether slip-on or threaded—to match your existing plumbing. Precision in aligning the diverter lever and verifying the internal valve operation will prevent water flow issues. Additionally, applying plumber’s tape on threaded connections enhances seal integrity and reduces the risk of future leaks.

Angela Martinez (Home Improvement Consultant and Licensed Contractor). From my experience, preparation is essential before installing a diverter spout. Inspect the condition of the copper or galvanized pipe to ensure it is free from corrosion or damage. If the pipe is compromised, replacement might be necessary before proceeding. After installation, always perform a thorough water test to check for leaks and confirm that the diverter properly switches between tub fill and shower functions.

Frequently Asked Questions (FAQs)

What tools are required to replace a bathtub spout with a diverter?
You will need an adjustable wrench, plumber’s tape, a screwdriver, a pipe wrench or channel locks, and possibly a hacksaw if pipe modifications are necessary.

How do I know if my bathtub spout has a threaded or slip-on connection?
Inspect the spout base; a threaded spout screws onto a threaded pipe nipple, while a slip-on spout slides onto a smooth pipe and is secured with a set screw underneath.

Can I install a diverter spout on an existing tub without changing plumbing?
Yes, as long as the existing plumbing supports a diverter function and the spout connection type matches, you can install a diverter spout without altering the plumbing.

How do I prevent leaks when installing a new diverter spout?
Apply plumber’s tape to the threaded pipe nipple or ensure the slip-on spout’s set screw is tight. Confirm the spout is securely attached and test for leaks before finishing.

What should I do if water continues to flow from the tub spout when the diverter is engaged?
Check the diverter mechanism for debris or damage. If faulty, replace the spout or the diverter valve to ensure proper water diversion to the showerhead.

Is it necessary to shut off the water supply before replacing a bathtub spout?
While not always mandatory, it is recommended to shut off the water supply or at least ensure the shower valve is off to prevent water flow during installation.
Replacing a bathtub spout with a diverter involves careful preparation, the right tools, and a clear understanding of the plumbing connections. The process typically includes turning off the water supply, removing the old spout by unscrewing or pulling it off depending on the type, and installing the new diverter spout by securely attaching it to the pipe or fitting. Ensuring the diverter mechanism functions properly is essential for directing water flow between the tub faucet and the showerhead.

Key considerations include identifying the type of existing spout—whether it is a slip-on or threaded model—as this determines the removal and installation method. Proper sealing with plumber’s tape or thread sealant helps prevent leaks. Additionally, testing the diverter after installation confirms that water is effectively redirected without drips or flow issues.

In summary, replacing a bathtub spout with a diverter is a manageable DIY task when approached methodically. Attention to detail, adherence to plumbing standards, and careful handling of components ensure a successful upgrade that enhances the functionality of the bathtub and shower system.

Author Profile

Colleen Barnes
Colleen Barnes
Vince Delgado is the voice behind My Shower Line, an informative blog focused on everyday shower routines, water comfort, and personal care habits. Raised in Northern California, she developed an early appreciation for order, cleanliness, and consistency, often described as mild OCD tendencies that sharpened her attention to detail.

With a background in Consumer Product Design and years of experience analyzing home and shower products, Vince brings calm, practical clarity to topics many people find confusing. Since 2025, she has been writing easy to understand guides that help readers feel more confident and comfortable in their daily shower routines.