How to Replace a Shower Drain

Replacing a shower drain might seem intimidating, but with the right tools, preparation, and approach, it’s an achievable DIY project. Whether your drain is outdated, corroded, or simply not functioning properly, replacing it yourself can improve your shower’s efficiency and prevent potential water damage. This guide will take you through each step to help you replace your shower drain successfully.

When to Replace a Shower Drain

Replacing a shower drain isn’t something you need to do often, but it’s time to consider a replacement if you notice any of the following:

• Water Damage: Persistent leaks around your drain can lead to damage in ceilings or floors below. Replacing the drain can help prevent further issues and costly repairs.
• Corrosion or Rust: Over time, metal drains may corrode or rust, compromising the drain's ability to function properly and creating an unpleasant look.
• Slow Drainage or Frequent Clogs: If you’ve cleaned your drain and it’s still backing up or draining slowly, the drain assembly may need an update to clear obstructions more effectively.
• Outdated Design: Older drains may lack the sleek design or features of newer models, such as better anti-clog mechanisms or more seamless styles that align with modern bathrooms.

Tools and Materials Needed

Gathering all necessary tools and materials ahead of time will make the job easier. Here’s what you’ll need:

• Screwdriver
• Pliers or channel-lock pliers
• Hacksaw or reciprocating saw
• Plumber’s putty
• Replacement drain assembly
• Caulk gun and silicone caulk
• Drywall saw (if accessing from below)
• Drywall tape and joint compound
• Paint (to match ceiling, if needed)
• Safety goggles and work gloves

Step-by-Step Guide to Replacing a Shower Drain

Now that you’re prepared, let’s get started on the steps to remove and install a new shower drain.

1. Turn Off the Water Supply

Begin by locating the water supply valves for your bathroom. This step isn’t always necessary, but it can help prevent any accidental leaks or spills, especially if you need to cut into pipes later on. Once the water supply is off, turn on the shower briefly to drain out any remaining water.

2. Access the Drain Area

To access the drain, you’ll need to reach the underside of your shower floor. This is typically done in one of two ways, depending on your bathroom setup:

• Ceiling Access: If your shower is on an upper floor, you may need to cut a small access hole in the ceiling below the bathroom.
• Crawl Space Access: For bathrooms on the ground floor, you may be able to access the drain from the crawl space or basement below.

3. Remove the Old Drain

Once you have access to the drain, follow these steps to remove it:

1. Unscrew the Drain Cover: Use a screwdriver to remove the cover or strainer on the drain.
2. Loosen the Locknut: With pliers, locate and loosen the locknut (the large ring or nut that holds the drain in place). Carefully remove the locknut.
3. Cut the Pipe (if needed): If the drain is glued or tightly fastened, you may need to cut through the drainpipe just below the drain assembly using a hacksaw or reciprocating saw. Take care not to damage surrounding pipes.
4. Clean the Area: After removing the old drain, clean the opening thoroughly. Scrape away any debris, old putty, caulk, or sealant to ensure a smooth surface for the new drain.

4. Install the New Drain Assembly

Once the area is clean and prepped, it’s time to install the replacement drain.

• Apply Plumber’s Putty: Roll a small amount of plumber’s putty in your hands to form a thin, even rope. Apply it around the base of the new drain flange, which is the part that will sit against the shower floor.
• Position the New Drain: Carefully place the drain into the opening, pressing firmly to ensure a watertight seal.
• Secure the Drain: Tighten the locknut from below, using pliers or a wrench to secure it in place. Double-check that the drain is seated correctly.
• Apply Silicone Caulk: After the drain is in place, apply a thin bead of silicone caulk around the edge of the drain. This will add extra waterproofing and help prevent future leaks.

5. Test for Leaks

Before sealing everything up, turn the water back on and test for leaks around the new drain. Run the shower for a few minutes and check below for any signs of dripping. If you see any leaks, tighten the drain further or add more caulk as needed.

6. Patch the Ceiling (if needed)

If you cut into the ceiling for access, follow these steps to repair it:

• Patch the Drywall: Use drywall tape and joint compound to cover any gaps or seams. Smooth out the compound with a putty knife and allow it to dry.
• Sand and Paint: Once the compound has dried, sand it smooth, then paint to match the surrounding ceiling for a seamless finish.

Additional Tips for a Smooth Replacement Process

• Safety First: Always wear safety goggles and gloves when cutting, drilling, or handling sharp tools. Shower drains are usually metal, which can create sharp edges.
• Take Photos as You Go: If you’re unfamiliar with the parts or layout, take photos of each step during disassembly. This will help guide you when it’s time to reassemble.
• Consult a Professional: If you encounter any difficulty—especially when it comes to cutting pipes or dealing with unseen leaks—consider consulting a licensed plumber.
• Consider Upgrading: When replacing a drain, think about upgrading to a newer model. Options like pop-up, linear, and tile-in drains offer a variety of looks and functions that may better suit your style or prevent future clogs.
• Follow Local Building Codes: While replacing a drain typically doesn’t require a permit, it’s essential to ensure your work aligns with local building codes, particularly if the drain’s connection to the plumbing is altered.

Troubleshooting Common Issues

While most shower drain replacements are straightforward, you may run into some common problems. Here’s how to handle them:

• Stuck or Corroded Parts: Older drains may be corroded or stuck. If the locknut or drain won’t budge, apply a penetrating lubricant and let it sit for 10–15 minutes before trying again.
• Misaligned Drain: If your new drain doesn’t align with the pipe below, you may need to adjust the angle of the pipe or use a flexible drain coupling to make a secure connection.
• Leaks After Installation: If you notice a leak after testing, the connection may not be tight enough. Try resealing with additional plumber’s putty or caulk, and double-check the locknut’s tightness.

What do you think? Is replacing a shower drain a job you want to tackle on your own? If you’re seeing signs of leaking or corrosion, then it may be time to give this process a go!

Copperlab is here to help with all home installations. Click here to find a shower drain for your project.