Why Does Water Come Out of My Shower Head and the Spout at the Same Time?

If you’ve ever turned on your bathtub faucet only to notice water trickling from the shower head at the same time, you’re not alone. This issue can be frustrating, as it reduces water pressure in the shower and makes bath time less efficient. Understanding why this happens and how to fix it can save you from unnecessary water waste and an unsatisfactory bathing experience.

Common Causes of Water Coming from Both the Shower Head and Spout

1. Faulty or Worn-Out Diverter Valve

The most common culprit for water flowing from both the shower head and tub spout simultaneously is a malfunctioning diverter valve. The diverter is responsible for redirecting water from the tub spout to the shower head when you pull a lever, turn a knob, or push a button.

Over time, diverter valves wear out due to constant use, sediment buildup, or mineral deposits. When the diverter doesn’t fully close, some water leaks up to the shower head while the tub spout is still running.

2. Partial Blockage or Mineral Deposits

Hard water minerals can accumulate inside the pipes, restricting proper water flow. This buildup can cause pressure imbalances that force some water to exit through both the tub spout and shower head simultaneously. If your home has hard water, this is a common issue.

3. Improper Installation or Plumbing Design Issues

If the shower plumbing wasn’t installed correctly, it could contribute to water escaping from both outlets. The height of the shower riser pipe or incorrect pipe sizing can create unwanted siphoning effects. A poorly installed or incompatible diverter valve can also cause this issue.

4. Worn Out Washers or Seals

The washers and seals inside the diverter valve can degrade over time. When they wear out, they fail to create a proper seal, allowing water to leak through both the tub spout and the shower head.

5. Water Pressure Problems

Inconsistent or excessively high water pressure can cause water to force its way through both openings instead of just one. If your home has fluctuating pressure, it may contribute to this problem.

How to Fix the Issue

If you’re experiencing this problem, don’t worry—there are solutions. Depending on the cause, you may need to clean, replace, or adjust components of your plumbing system.

1. Check and Clean the Diverter Valve

If mineral buildup is the issue, cleaning the diverter valve may solve the problem. Here’s how you can do it:

• Remove the diverter knob or handle.
• Unscrew the valve from the faucet body.
• Soak the valve in white vinegar for a few hours to break down mineral deposits.
• Scrub it with a toothbrush and rinse before reinstalling.

If the valve is severely damaged or corroded, replacing it is the better option.

2. Replace the Diverter Valve

If cleaning doesn’t work, you may need to replace the diverter valve altogether. This process involves:

• Shutting off the water supply.
• Removing the tub spout or faucet to access the diverter.
• Taking out the old diverter and installing a new one.
• Reassembling everything and testing the water flow.

Diverter valves are relatively inexpensive, and replacing them is a straightforward fix that can restore normal function.

3. Inspect for Mineral Buildup and Clean the Pipes

If hard water deposits are clogging the pipes, you may need to clean them:

• Fill a plastic bag with vinegar and secure it around the tub spout and shower head.
• Let it sit for several hours to dissolve mineral deposits.
• Flush the system by running water to clear out any remaining debris.

If mineral buildup is severe, consider installing a water softener to prevent future issues.

4. Adjust or Replace the Tub Spout

Some tub spouts with built-in diverters wear out and fail to fully close. Replacing the entire spout might be necessary. To do this:

• Unscrew or pull off the old spout (some have a set screw underneath).
• Apply plumber’s tape to the pipe threads.
• Install the new tub spout and test the diverter function.

5. Check for Pipe Sizing and Pressure Issues

If improper pipe sizing or pressure fluctuations are to blame, consult a plumber. They may recommend adjusting your plumbing setup, installing a pressure regulator, or modifying pipe configurations to prevent unwanted flow.

Installation Video

Preventing Future Problems

To avoid recurring issues, consider these preventive measures:

• Regular Maintenance: Periodically check and clean the diverter valve and spout to prevent mineral buildup.
• Install a Water Softener: This helps reduce mineral deposits that can clog valves and pipes.
• Monitor Water Pressure: Excessively high pressure can wear out plumbing components faster.
• Replace Components as Needed: If you notice your diverter isn’t working properly, address it before it worsens.

When to Call a Plumber

If you’ve tried the above fixes and still experience issues, it may be time to call a professional. A plumber can:

• Diagnose underlying problems, such as improper pipe sizing.
• Replace faulty components with higher-quality alternatives.
• Ensure the plumbing system meets code requirements.

Final Thoughts

Water coming from both the tub spout and shower head at the same time is a common yet fixable issue. In most cases, the diverter valve is to blame, and cleaning or replacing it can resolve the problem. Regular maintenance and proper plumbing installation are key to preventing future occurrences. If you’re unsure about DIY repairs, seeking professional assistance is always a good idea to ensure your bathroom plumbing functions efficiently.