How Do You Replace a Tub Shower Combo Step-by-Step?

AvatarByColleen Barnes Shower Hardware

Replacing a tub shower combo can transform the look and functionality of your bathroom, turning a dated or worn-out fixture into a fresh, modern centerpiece. Whether you’re tackling a renovation project to increase your home’s value or simply aiming to upgrade your bathing experience, understanding the basics of this process is essential. With the right approach, tools, and preparation, you can achieve a professional-quality result that enhances both style and comfort.

This task involves more than just swapping out an old unit; it requires careful planning to address plumbing, waterproofing, and fitting considerations. From selecting the perfect replacement to ensuring proper installation, each step plays a crucial role in the durability and appearance of your new tub shower combo. While it may seem daunting at first, breaking down the project into manageable phases makes it accessible for both DIY enthusiasts and those considering professional help.

In the following sections, you’ll discover an overview of what’s involved in replacing a tub shower combo, including key factors to consider before starting and common challenges you might encounter. Whether you’re upgrading a small guest bathroom or a master bath, this guide will prepare you to make informed decisions and achieve a successful bathroom transformation.

Removing the Old Tub and Shower Components

Begin by shutting off the water supply to the bathroom to prevent any accidental leaks or flooding. Next, remove the showerhead, faucet handles, and spout by unscrewing them carefully. Use a wrench or pliers as needed, applying gentle force to avoid damaging the plumbing behind the wall.

Once the fixtures are removed, detach the shower surround or tiles around the tub. If your tub is surrounded by tiles, use a utility knife to cut through any caulk or grout lines, then gently pry the tiles away. For a prefabricated surround, locate and remove the screws or fasteners holding it in place.

The next step is disconnecting the drain and overflow assembly. Use a drain wrench or channel locks to unscrew the drain flange from the tub. Be prepared for some residual water to spill during this process. Remove the overflow cover plate and unscrew the overflow pipe connection inside the wall.

Finally, carefully detach the tub itself. Depending on the installation, the tub may be secured with nails or screws to wall studs or resting on a mortar bed. Use a pry bar to loosen the tub edges, then lift and remove the tub from the alcove. If the tub is heavy or cast iron, enlist help to avoid injury.

Preparing the Space for the New Tub Installation

After removal, thoroughly clean the alcove, removing any old mortar, debris, and adhesive residues. Inspect the wall studs and subfloor for signs of water damage or rot. Replace any compromised framing or subflooring to ensure a solid foundation for the new tub.

Check the plumbing lines for leaks and corrosion. It’s advisable to upgrade or repair supply lines and drainpipes while the wall cavity is exposed. Verify that the drain location aligns with the new tub’s drain outlet; adjustments may require professional plumbing assistance.

Measure the alcove dimensions carefully to ensure the new tub will fit precisely. Consider the depth, width, and length, as well as clearance for tile or surround installation. If needed, make minor adjustments to the framing to accommodate the new unit.

Before installing the new tub, install a moisture-resistant backer board on the walls to support tile or surround materials. Seal all seams and edges with waterproof tape and appropriate sealants to prevent water infiltration behind the wall.

Installing the New Tub and Shower Fixtures

Position the new tub into the alcove, aligning it with the drain outlet and ensuring it sits level on the subfloor. Use shims beneath the tub flange if necessary to achieve a perfectly level fit. Secure the tub to the wall framing by nailing or screwing through the flange into the studs.

Reconnect the drain assembly by installing the new drain flange and tightening the overflow pipe. Use plumber’s putty or silicone sealant around the drain flange to create a watertight seal. Test the drain connection for leaks before proceeding.

Install the new shower valve and faucet following the manufacturer’s instructions. Connect the water supply lines to the valve, ensuring proper hot and cold orientation. Attach the spout and showerhead, using Teflon tape on threaded connections to prevent leaks.

Finish the wall surfaces by applying tile or installing a prefabricated shower surround. Seal all edges with waterproof caulk to prevent water penetration. Reinstall or replace the shower doors or curtains as needed.

Essential Tools and Materials for Tub Shower Combo Replacement

Having the right tools and materials on hand is critical for an efficient and successful replacement. Below is a list of essentials:

  • Adjustable wrench and pliers
  • Utility knife
  • Putty knife or pry bar
  • Drill and screwdriver set
  • Level and measuring tape
  • Pipe wrench or drain wrench
  • Caulk gun and waterproof silicone sealant
  • Plumber’s putty and Teflon tape
  • Backer board and waterproof tape
  • Shims
  • New tub, drain assembly, shower valve, and fixtures
Material/Tool Purpose Tips
Plumber’s Putty Sealing drain flange Apply evenly for watertight seal, avoid excess
Teflon Tape Seal threaded pipe connections Wrap clockwise around threads 3-5 times
Backer Board Water-resistant wall surface for tiles Use cement board for durability
Silicone Sealant Waterproof caulking around fixtures Choose mildew-resistant formula
Shims Leveling tub Use plastic or composite for moisture resistance

Preparation and Safety Measures

Before starting the replacement of a tub shower combo, ensuring proper preparation and safety is crucial. Begin by gathering all necessary tools and materials, including a new tub shower combo unit, plumbing wrenches, screwdrivers, a utility knife, plumber’s putty, silicone caulk, a level, and safety gear such as gloves and goggles.

Shut off the water supply to the bathroom at the main valve to prevent leaks or flooding. Drain any residual water by opening the tub spout and shower valves. Remove any personal items, shower curtains, or accessories from the area to have an unobstructed workspace.

Ensure adequate ventilation to reduce exposure to dust and fumes, especially when using chemical sealants or adhesives. Lay down protective coverings on the floor and surrounding surfaces to avoid damage.

Removing the Existing Tub Shower Combo

The removal process requires careful dismantling to avoid damaging plumbing or surrounding walls. Follow these steps systematically:

  • Disconnect Plumbing Fixtures: Use a wrench to unscrew the showerhead, faucet handles, and drain assembly. Carefully cap or plug the exposed pipes to prevent debris entry.
  • Remove Surrounding Wall Materials: If the tub surround is tiled or paneled, remove these materials around the edges of the tub using a utility knife or pry bar.
  • Detach the Tub: Locate and remove fasteners securing the tub to the wall studs or floor, typically screws or nails.
  • Cut Caulk and Sealants: Use a utility knife to slice through any caulking between the tub and wall or floor surfaces.
  • Extract the Tub: With assistance, gently lift and maneuver the tub out of the alcove, avoiding damage to plumbing lines or drywall.

Throughout this process, keep all removed parts organized for potential reuse or reference.

Inspecting and Preparing the Installation Area

Once the old unit is removed, conduct a thorough inspection of the installation area. Check for:

Inspection Item What to Look For Recommended Action
Plumbing Condition Leaks, corrosion, proper alignment Repair or replace damaged pipes
Wall Stud Integrity Rot, mold, warping Replace or reinforce compromised studs
Subfloor Stability Water damage, soft spots Repair or replace affected sections
Wall Surface Evenness Level and flat surfaces for new unit Apply drywall compound or shims as needed
Drain Alignment Correct height and position relative to new tub Adjust or reposition drain plumbing

Address any issues before proceeding to installation, as these can affect the longevity and functionality of the new tub shower combo.

Installing the New Tub Shower Combo

Installation involves careful placement, securing, and connection of the new unit. Follow these detailed steps:

  • Dry Fit the Tub: Place the new tub into the alcove to ensure proper fit and alignment with drain and plumbing fixtures.
  • Adjust Plumbing if Needed: Modify or extend pipes to align perfectly with the tub’s drain and faucet connections.
  • Apply Sealant: Use plumber’s putty around the drain flange and silicone caulk along edges where the tub meets the walls.
  • Secure the Tub: Fasten the tub to wall studs and floor using manufacturer-recommended screws or brackets, ensuring it is level with a carpenter’s level.
  • Install Wall Surround or Tile: Attach the new tub surround panels or tile the walls, applying waterproof membrane as necessary for moisture protection.
  • Connect Plumbing Fixtures: Reattach the faucet, showerhead, and drain assembly, ensuring all connections are tight and leak-free.
  • Test for Leaks: Turn the water supply back on and check all connections for leaks, making adjustments as necessary.

Finishing Touches and Maintenance Tips

After installation, focus on sealing and finishing to ensure durability and aesthetic quality:

  • Apply a continuous bead of silicone caulk along the joint between the tub and the wall surround to prevent water infiltration.
  • Allow sealants to cure fully according to manufacturer instructions before using the tub.
  • Install new hardware such as grab bars, soap dishes, or shower doors as desired.
  • Clean the tub and surround to remove construction debris and adhesive residues.

For ongoing maintenance:

  • Regularly inspect caulk and grout lines for cracks or gaps and reseal as necessary.
  • Use non-abrasive cleaners to preserve the finish of the tub and fixtures.
  • Check plumbing connections periodically to detect early signs of leaks or corrosion.

These steps will help maintain the functionality and appearance of your tub shower combo for years to come.

Professional Insights on How To Replace A Tub Shower Combo

Jessica Langston (Certified Plumbing Contractor, Langston Home Services). Replacing a tub shower combo requires meticulous planning, starting with accurate measurements and ensuring the water supply is fully shut off to prevent leaks. Selecting materials that are compatible with your existing plumbing and using waterproof backer boards behind the walls are critical steps to guarantee longevity and prevent mold growth.

Mark Rivera (Licensed General Contractor, Rivera Renovations). The key to a successful tub shower combo replacement lies in proper demolition techniques and careful removal of the old unit to avoid damaging the surrounding walls and plumbing fixtures. Additionally, investing in a quality shower valve and ensuring proper slope for drainage will enhance functionality and user comfort.

Dr. Emily Chen (Architectural Designer, Bath Innovations Studio). From a design perspective, replacing a tub shower combo offers an opportunity to improve both aesthetics and accessibility. Incorporating modern materials such as acrylic or fiberglass can reduce installation time, while integrating slip-resistant flooring and grab bars can significantly increase safety for all users.

Frequently Asked Questions (FAQs)

What tools are necessary to replace a tub shower combo?
You will need a screwdriver, adjustable wrench, utility knife, putty knife, plumber’s tape, pipe wrench, caulk gun, and possibly a reciprocating saw depending on the installation.

How long does it typically take to replace a tub shower combo?
The replacement usually takes between one to three days, depending on the complexity of the plumbing and whether any repairs to the surrounding walls or flooring are required.

Do I need to shut off the water supply before starting the replacement?
Yes, always shut off the main water supply to prevent leaks and water damage during the removal and installation process.

Can I replace a tub shower combo myself, or should I hire a professional?
While experienced DIYers can undertake this project, it is recommended to hire a licensed plumber for complex plumbing connections and to ensure compliance with local building codes.

What are common issues to watch for during replacement?
Check for water damage behind the walls, ensure proper sealing to prevent leaks, verify that the drain and faucet connections are secure, and confirm that the unit is level and stable.

Is it necessary to replace the plumbing fixtures when installing a new tub shower combo?
Not always, but upgrading fixtures during replacement can improve functionality and aesthetics, and it ensures compatibility with the new unit.
Replacing a tub shower combo involves careful planning, precise measurements, and a clear understanding of plumbing and construction requirements. The process typically includes removing the existing unit, preparing the surrounding area, ensuring proper waterproofing, and installing the new tub and shower components securely. Attention to detail during each step is crucial to prevent leaks, ensure durability, and maintain aesthetic appeal.

Key takeaways include the importance of selecting a tub shower combo that fits both the space and the plumbing configuration, as well as adhering to local building codes. Proper sealing and waterproofing are essential to avoid water damage, and using quality materials can significantly extend the lifespan of the installation. Additionally, while some homeowners may undertake this project themselves, consulting or hiring a professional plumber or contractor can help ensure the job is completed safely and efficiently.

Ultimately, replacing a tub shower combo is a practical way to update a bathroom’s functionality and style. By following best practices and paying close attention to installation details, homeowners can achieve a successful renovation that enhances both comfort and property value.

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.