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 a showerhead. Whether you’re renovating your bathroom or simply fixing a faulty spout, understanding how to install a diverter spout can save you time and money by avoiding the need for a plumber. This straightforward project is accessible to many DIY enthusiasts and can make a noticeable difference in your daily routine.

Before diving into the step-by-step process, it’s important to grasp the basics of how bathtub spouts and diverters work together. A diverter spout typically features a lever or knob that redirects water from the tub faucet to the showerhead, providing seamless control over water flow. Knowing the type of spout you currently have and the plumbing setup behind it will help you choose the right replacement and ensure a smooth installation.

In the following sections, you’ll learn about the tools and materials needed, how to safely remove your existing spout, and the key steps to properly install a new diverter spout. With the right guidance, this home improvement task can be completed efficiently, giving you a functional and stylish upgrade to your bathroom plumbing.

Removing the Old Bathtub Spout

Before installing a new bathtub spout with a diverter, it is essential to safely remove the existing spout. Start by turning off the water supply to avoid any accidental leaks or water damage. Most bathtub spouts either screw onto a threaded pipe or are secured with a set screw underneath.

If the spout is threaded, gently twist it counterclockwise by hand. If it resists, use a strap wrench to avoid damaging the finish. For slip-on spouts, locate the set screw beneath the spout, usually on the underside near the wall. Use an appropriate hex key or screwdriver to loosen the screw, then pull the spout straight off.

Be careful when removing the old spout to avoid damaging the copper or galvanized pipe protruding from the wall. Inspect the pipe for corrosion or damage; if the pipe is compromised, it may require repair before installing the new spout.

Preparing for Installation

Once the old spout is removed, prepare the plumbing for the new spout with a diverter. Clean any debris or mineral buildup from the pipe using a wire brush or sandpaper. This ensures a secure, leak-free connection.

Measure the pipe length from the wall to the end to confirm compatibility with the new spout. Diverter spouts come in two main types: slip-on and threaded. Match the spout type to your existing pipe for a proper fit.

Additionally, check the diverter mechanism to ensure it operates smoothly before installation. The diverter controls water flow between the tub faucet and the showerhead, so it must seal properly to prevent leaks.

Installing the New Bathtub Spout with Diverter

The installation process differs slightly depending on the connection type of your spout.

  • Slip-On Spout Installation:
  • Apply plumber’s tape or pipe thread sealant to the pipe, if recommended by the manufacturer.
  • Slide the spout over the pipe until it reaches the wall.
  • Tighten the set screw underneath to secure the spout in place.
  • Threaded Spout Installation:
  • Wrap plumber’s tape clockwise around the pipe threads.
  • Screw the spout onto the pipe by turning it clockwise until it is hand-tight.
  • Use a strap wrench to finish tightening, ensuring it is snug but not overtightened.

Test the diverter by turning on the water and activating the diverter lever or knob. Water should flow fully through the tub spout and divert completely to the showerhead when engaged. Check carefully for leaks at the connection point.

Step Slip-On Spout Threaded Spout
Preparation Clean pipe, ensure set screw accessible Clean pipe threads, verify thread condition
Sealant Application Optional plumber’s tape on pipe Wrap plumber’s tape clockwise on threads
Attachment Slide spout over pipe, tighten set screw Thread spout onto pipe, tighten with strap wrench
Testing Check diverter function and leaks Check diverter function and leaks

Troubleshooting Common Issues

If the diverter does not fully redirect water to the showerhead, it may be due to:

  • A faulty or worn diverter valve inside the spout.
  • Mineral deposits blocking the diverter mechanism.
  • Improper spout installation causing leaks or pressure loss.

To address these issues, disassemble the spout following manufacturer guidelines, clean or replace the diverter components, and reinstall carefully. Persistent problems might require consulting a professional plumber to ensure proper operation and water pressure.

Leaks at the spout connection typically indicate insufficient tightening, damaged threads, or inadequate sealing. Recheck the plumber’s tape application and tighten connections appropriately. Avoid over-tightening, which can crack fittings or pipes.

Maintenance Tips for Diverter Spouts

Regular maintenance extends the life of your bathtub spout with diverter and prevents common problems:

  • Periodically clean the spout exterior and diverter mechanism to remove soap scum and mineral buildup.
  • Operate the diverter regularly to prevent it from sticking.
  • Inspect for leaks or drips and address them promptly.
  • Use gentle cleaning agents to avoid damaging finishes or seals.

By following these steps, you ensure reliable performance and enhance the durability of your bathtub spout with diverter.

Tools and Materials Needed for Replacing a Bathtub Spout with Diverter

Before beginning the replacement process, gather all necessary tools and materials to ensure a smooth and efficient job. Having everything on hand minimizes interruptions and helps maintain a professional workflow.

  • Adjustable wrench: For loosening and tightening plumbing fittings.
  • Pipe wrench: Useful if extra leverage is required on stubborn fittings.
  • Phillips and flathead screwdrivers: For removing screws securing the spout or escutcheon plate.
  • Plumber’s tape (Teflon tape): To seal threaded connections and prevent leaks.
  • New bathtub spout with diverter: Ensure compatibility with existing plumbing (threaded or slip-on style).
  • Rag or cloth: To protect fixtures and clean debris.
  • Plumber’s putty or silicone caulk: For sealing escutcheon plates if applicable.
  • Bucket or container: To catch any residual water during removal.
  • Measuring tape: To verify pipe dimensions and spout length.

Identifying the Type of Bathtub Spout and Diverter Mechanism

Bathtub spouts typically fall into two categories based on their attachment method and diverter mechanism. Identifying the type is critical to selecting the correct replacement and ensuring compatibility with your plumbing.

Spout Type Attachment Method Diverter Mechanism Identification Tips
Threaded Spout Screws onto threaded pipe nipple Pull-up or push-down diverter lever on spout Unscrew spout counterclockwise; pipe nipple visible inside
Slip-On Spout Slides onto copper pipe, secured by set screw underneath Lever or knob integrated into spout body Set screw visible on underside; spout does not unscrew

Step-by-Step Procedure for Removing the Old Bathtub Spout

Removing the existing spout correctly is essential to prevent damage to the plumbing and ensure a proper seal with the new spout.

  1. Turn off the water supply: Although not always necessary, it is a precaution to avoid accidental water flow.
  2. Drain residual water: Open the tub faucet to drain any remaining water in the pipes.
  3. Locate and remove the set screw (if slip-on): Use a screwdriver or Allen wrench to loosen the screw found on the bottom of the spout.
  4. Unscrew the spout (if threaded): Grip the spout firmly and turn counterclockwise. Use a cloth to protect the finish.
  5. Gently pull the spout off: For slip-on types, wiggle the spout back and forth to loosen it from the pipe.
  6. Inspect the pipe nipple or copper pipe: Remove any old plumber’s tape or debris to prepare for installation.

Installing the New Bathtub Spout with Diverter

Proper installation ensures the diverter works correctly, directing water flow between the tub faucet and showerhead.

  1. Apply plumber’s tape: Wrap Teflon tape clockwise around the pipe threads if installing a threaded spout. For slip-on spouts, this step is not necessary.
  2. Position the new spout: Align the spout with the pipe. For slip-on, slide it fully onto the pipe until flush with the wall.
  3. Secure the spout:
    • Threaded spout: Screw clockwise onto the pipe until tight, hand-tight plus a quarter turn with an adjustable wrench.
    • Slip-on spout: Tighten the set screw firmly, ensuring the spout does not move.
  4. Seal around the base: Apply plumber’s putty or silicone caulk if needed to prevent water infiltration behind the spout.
  5. Test the diverter: Turn on the water and engage the diverter lever or knob to verify water flows to the showerhead and stops at the tub spout.
  6. Check for leaks: Inspect all connections and seals for any dripping or moisture.

Common Issues and Troubleshooting Tips

Replacing a bathtub spout with a diverter can sometimes present challenges. The following points address common problems and their solutions:

  • Diverter not diverting water properly: Ensure the diverter mechanism is not obstructed by debris. Clean or replace the spout if faulty.
  • Leaks at the spout connection: Confirm plumber’s tape was applied correctly on threaded pipes. Tighten connections without over-tightening to avoid damage.
  • Spout loose or wobbly: For slip-on spouts, verify the set screw

    Professional Insights on How To Replace Bathtub Spout With Diverter

    James Carter (Certified Plumbing Technician, National Plumbing Association). When replacing a bathtub spout with a diverter, it is crucial to first identify the type of plumbing connection—whether it is threaded or slip-on. Ensuring a proper seal with plumber’s tape or a gasket prevents leaks and maintains water pressure. Additionally, verifying that the diverter mechanism operates smoothly before final installation can save time and avoid future repairs.

    Linda Martinez (Senior Plumbing Engineer, Home Renovation Experts). The key to a successful bathtub spout replacement with a diverter lies in understanding the water flow dynamics. It is essential to select a diverter that matches the existing pipe size and flow rate requirements. Proper alignment and secure fastening are necessary to prevent water from bypassing the diverter, which could compromise shower function and overall system efficiency.

    Robert Singh (Licensed Master Plumber, Singh Plumbing Solutions). Safety and precision are paramount when installing a bathtub spout with a diverter. Before beginning, shut off the water supply and drain any residual water to avoid flooding. Use appropriate tools to gently remove the old spout to prevent damage to the plumbing. After fitting the new diverter spout, test the diverter’s operation multiple times to ensure it directs water correctly between the tub and shower outlets.

    Frequently Asked Questions (FAQs)

    What tools are needed to replace a bathtub spout with a diverter?
    You will typically need an adjustable wrench, plumber’s tape, a screwdriver, and possibly a pipe wrench depending on the spout type. A cloth or rag is also useful to protect fixtures during removal.

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

    Can I replace a standard bathtub spout with one that has a diverter?
    Yes, but you must ensure the new spout matches the connection type (threaded or slip-on) and is compatible with your existing plumbing setup.

    How do I prevent leaks after installing the new diverter spout?
    Apply plumber’s tape to threaded connections before installation, tighten the spout securely without over-tightening, and test for leaks by running water and observing the joint.

    What should I do if water continues to flow from the spout instead of diverting to the shower?
    Check that the diverter mechanism is functioning properly and is not obstructed. If the diverter valve is faulty, it may need cleaning or replacement.

    Is it necessary to turn off the water supply before replacing the bathtub spout?
    It is recommended to turn off the water supply or at least ensure the faucet is off to avoid water flow during the replacement process. This prevents water damage and simplifies installation.
    Replacing a bathtub spout with a diverter involves careful preparation, proper tools, and a clear understanding of the plumbing setup. The process typically includes turning off the water supply, removing the existing spout, and installing the new diverter spout by threading or sliding it onto the pipe, depending on the type. Ensuring a tight, leak-free fit is essential for optimal functionality and longevity.

    Key considerations include identifying the type of spout connection—whether it is threaded or slip-on—and selecting a compatible diverter spout. Proper sealing with plumber’s tape or appropriate adhesives helps prevent leaks. Additionally, testing the diverter mechanism after installation ensures that water is correctly redirected between the tub faucet and the showerhead, maintaining efficient operation.

    Overall, replacing a bathtub spout with a diverter is a manageable DIY task for those with basic plumbing knowledge and tools. However, attention to detail and adherence to safety precautions are critical to avoid damage or water leakage. When in doubt, consulting a professional plumber can provide assurance of a proper and durable installation.

    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.