Are you experiencing a frustrating issue with your second floor shower not draining as it should? You're not alone. This common plumbing problem can be caused by a variety of issues, ranging from simple clogs to more complex problems like damaged pipes. In this article, we'll explore the possible reasons behind this issue and provide you with practical solutions to help you diagnose and fix the problem.
Understanding the Drainage System
Before we dive into the possible causes and solutions, it's essential to understand how your shower's drainage system works. On the second floor, water flows down through pipes connected to the main drain line, usually located in the basement. Any blockages or issues in this system can cause water to backup and not drain properly.
Common Causes: Why Your Second Floor Shower Isn't Draining
Clogs
Clogs are the most common reason for shower drains not working properly. Over time, hair, soap scum, and other debris can build up and cause a blockage. This is especially true in second-floor showers, where gravity can cause these materials to accumulate more quickly.

Pipe Damage or Breakage
If your home is older, the pipes in your walls and floors may be damaged or broken. This can cause water to leak out instead of draining properly, leading to a backed-up shower. Tree roots can also infiltrate pipes, causing blockages and damage.
Improperly Slope Pipes
Pipes should be installed with a slight slope to allow water to flow freely towards the main drain. If the pipes are not sloped correctly, water may not drain properly, leading to backups and slow drainage.
Main Drain Line Issues
If your second-floor shower and other drains in your home are backing up, the problem might be with the main drain line. This could be due to a clog, damage, or a bellied pipe (a section of pipe that has sunk below the rest, causing water to pool).

Diagnosing the Problem
Before you can fix the issue, you need to determine the cause. Here are some steps you can take to diagnose the problem:
- Check Other Drains: If other drains in your home are also slow or backing up, the problem is likely with the main drain line.
- Inspect the Shower Drain: Remove the drain cover and look for any visible clogs or damage.
- Use a Plunger: Plunging the drain can help dislodge minor clogs. If water drains properly after plunging, the problem is likely a minor clog.
- Perform a Dye Test: Add some food coloring to the shower and wait a few minutes. If the color appears in other drains or fixtures, it indicates that there's a problem with the main drain line.
Solving the Problem: DIY and Professional Solutions
Once you've diagnosed the problem, you can decide whether it's a DIY fix or requires professional help.
DIY Solutions
If the problem is a minor clog, you can try these DIY solutions:
- Plunging: As mentioned earlier, plunging can help dislodge minor clogs.
- Drain Cleaners: Chemical drain cleaners can help dissolve minor clogs. However, be careful when using these products, as they can damage pipes if used too frequently or improperly.
- Snake the Drain: If plunging and drain cleaners don't work, you can try snaking the drain. This involves using a drain snake, a long, flexible tool designed to reach and break up clogs.
Professional Solutions
If the problem is more complex, such as damaged pipes or a main drain line issue, it's best to call a professional plumber. Here are some professional solutions:
- Hydrojetting: This involves using high-pressure water to clean out pipes. It's a more powerful and effective alternative to drain cleaners.
- Pipe Repair or Replacement: If pipes are damaged or broken, they may need to be repaired or replaced.
- Camera Inspection: A plumber can use a camera to inspect your pipes and determine the exact location and cause of the problem.
Remember, prevention is always better than cure. Regular maintenance, such as cleaning your shower drain regularly and installing a drain guard to catch hair and other debris, can help prevent clogs and other issues.
In conclusion, a second floor shower not draining can be a frustrating and inconvenient problem. However, with the right diagnosis and solution, you can get your shower draining properly again. If you're unsure about any aspect of the process, don't hesitate to call a professional plumber for help.