Have you noticed that when you turn on your shower, water still leaks from the bathtub spout? This problem wastes water, lowers your shower pressure, and can signal worn-out parts in your faucet system. The good news is that this is a very common issue, and with a few simple steps you can often fix it yourself. If your faucet is too old or damaged, replacing it with a modern shower system may be the best long-term solution.
Why Does the Bathtub Faucet Leak When the Shower Is On?
When you switch your tub spout to “shower mode,” a diverter valve redirects water from the spout to the showerhead. If that diverter isn’t working properly, water will escape through the spout while the shower is running. Here are the most common reasons:
- Worn diverter valve – The most common cause. Rubber seals inside wear out over time.
- Mineral buildup – Hard water deposits can block the valve from sealing completely.
- Old or corroded spout – If your faucet is old, the spout itself may be cracked or damaged.
- Incorrect installation – A poorly fitted diverter spout may leak from day one.
How to Fix a Leaking Bathtub Spout
Before replacing your whole faucet system, try these simple fixes:
- Turn off the water supply. Shut off your bathroom’s water lines before disassembling anything.
- Check the diverter knob. Make sure it’s lifting fully into the shower position.
- Clean the diverter. Remove the tub spout, soak it in vinegar, and scrub off mineral buildup.
- Replace the spout or diverter valve. Most tub spouts with built-in diverters are inexpensive and easy to replace.
- Test for leaks. Run the shower and see if water still flows from the spout.
If water still leaks heavily, or if your faucet system is older, it may be smarter to replace the entire tub and shower faucet setup.
When to Replace Instead of Repair
Repairs are fine if your faucet is fairly new. But consider a full replacement if:
- The faucet is over 10 years old.
- The finish is worn or corroded.
- You want to upgrade to a more stylish or efficient shower system.
- The leak persists even after replacing the spout.
Modern tub and shower faucet systems offer better water control, improved diverters, and stylish finishes to match your bathroom remodel.
Best Replacement Bathtub & Shower Faucet Systems
Moen Adler 82604 Tub and Shower Faucet
Best Overall Choice for reliability and ease of installation.
- Pressure balancing to prevent sudden hot/cold changes.
- Available in chrome, brushed nickel, and bronze finishes.
- Comes with a built-in diverter tub spout and showerhead.
Pros:
- Budget-friendly but durable
- Easy to install with common tools
- Strong shower pressure
Cons:
- Basic showerhead (can be upgraded separately)
- Valve body may require professional installation
Final Verdict: A reliable, affordable upgrade that fixes diverter issues fast. Check Price on Amazon.
Delta Faucet Windemere Tub and Shower Trim Kit
Best for traditional style bathrooms.
- Includes a matching showerhead and diverter spout.
- WaterSense labeled for efficiency.
- Available in oil-rubbed bronze for a rustic look.
Pros:
- Classic, elegant design
- Water-saving features
- Durable metal construction
Cons:
- Valve sold separately
- May require professional installation
Final Verdict: A stylish upgrade that adds charm to your bathroom. Check Price on Amazon.
Grohe Concetto Pressure Balance Tub & Shower Faucet
Best Luxury Choice for modern remodels.
- German-engineered for durability and performance.
- Precision pressure balance valve keeps water steady.
- StarLight chrome finish resists tarnishing.
Pros:
- Premium quality build
- Sleek, modern design
- Excellent leak resistance
Cons:
- Higher price point
- Professional installation recommended
Final Verdict: Perfect for homeowners wanting a high-end bathroom upgrade. Check Price on Amazon.
Comparison Table
| Faucet | Key Features | Style | Price |
|---|---|---|---|
| Moen Adler | Pressure balancing, built-in diverter | Modern | $$ |
| Delta Windemere | Classic trim kit, WaterSense | Traditional | $$$ |
| Grohe Concetto | Pressure balance, luxury design | Luxury | $$$$ |
FAQ
1. Is it normal for some water to come from the spout when the shower is on?
A tiny trickle is normal, but a steady stream means your diverter isn’t sealing properly.
2. Can I just replace the tub spout instead of the whole faucet?
Yes — if the diverter inside the spout is the problem, a new spout will usually fix it. However, if the faucet body is worn, a full replacement may be necessary.
3. How long should a tub diverter last?
Most diverter spouts last 7–10 years. Hard water and frequent use can shorten their lifespan.
4. Do new shower systems save water?
Yes, most modern shower faucets are WaterSense certified, meaning they reduce water use without sacrificing performance.
Conclusion
A bathtub faucet leaking from the spout when the shower is on is almost always caused by a failing diverter. While you can often fix it by replacing the tub spout, a full faucet replacement is the best way to stop leaks and improve your shower experience.
If you’re tired of leaks and wasted water, consider upgrading to a modern faucet system. Shop today’s best bathtub and shower faucets on Amazon and enjoy better performance and style for years to come.