If your bathtub faucet leaks when the shower is turned on, you’re not alone. This problem is very common and usually linked to the diverter, the small part that redirects water from the tub spout to the showerhead. The leak not only wastes water but also reduces shower pressure, making your daily routine frustrating. Let’s look at why this happens, how to fix it, and when it’s time to consider replacing the faucet with a modern system.
Why Does the Tub Spout Leak During a Shower?
When you pull the diverter knob on the tub spout, it should completely block water from flowing out of the faucet and send it to the showerhead instead. If water still pours from the spout, the diverter isn’t sealing properly. Common causes include:
- Worn diverter valve – Over time, seals inside the spout wear down and can no longer block water fully.
- Mineral buildup – Hard water deposits may keep the diverter from closing tightly.
- Damaged spout – Cracks or corrosion in an old tub spout can allow leaks.
- Poor installation – If the spout isn’t installed properly, water can bypass the diverter.
How to Fix a Leaking Bathtub Faucet Diverter
Before spending money on a plumber, try these DIY steps:
- Shut off the water supply. Always turn off water before removing the faucet.
- Inspect the diverter knob. Make sure it pulls up and stays locked in place.
- Remove and clean the spout. Unscrew the tub spout, soak it in vinegar to dissolve mineral deposits, and rinse thoroughly.
- Replace the spout if needed. A new diverter spout is inexpensive and can be installed in minutes with basic tools.
- Test your shower. If water still pours out of the spout, the problem may be in the valve system inside the wall.
At that point, replacing the entire bathtub faucet set may be the smarter option, especially if your current one is outdated or corroded.
When to Replace Instead of Repair
It’s worth replacing your tub and shower faucet if:
- The faucet is more than 10 years old.
- The finish is chipped, rusted, or stained.
- You’ve replaced the spout but the leak continues.
- You want a modern style upgrade with better water control.
Modern shower systems are built with improved diverters and ceramic disc valves that last longer and save water.
Top Bathtub & Shower Faucet Replacements
Here are three excellent options from Amazon that combine style, reliability, and performance:
Moen Adler 82604 Tub and Shower Faucet
Best Overall for affordability and everyday reliability.
- Pressure balancing to prevent sudden hot/cold changes.
- Durable finish options: chrome, brushed nickel, bronze.
- Includes diverter spout and showerhead.
Pros:
- Easy to install
- Budget-friendly
- Good water pressure
Cons:
- Basic showerhead (can be upgraded)
- Valve installation may require a plumber
Verdict: A practical choice for most households. Check Price on Amazon.
Delta Faucet Windemere Tub and Shower Trim Kit
Best for traditional style bathrooms.
- WaterSense certified for efficiency.
- Includes tub spout, showerhead, and trim kit.
- Oil-rubbed bronze finish available for rustic looks.
Pros:
- Elegant design
- Durable construction
- Water-saving features
Cons:
- Valve sold separately
- Professional installation recommended
Verdict: Perfect for a timeless bathroom upgrade. Check Price on Amazon.
Grohe Concetto Pressure Balance Tub & Shower Faucet
Best Luxury Choice for high-end remodels.
- German-engineered for precision and reliability.
- Pressure balance valve ensures steady water temperature.
- Chrome finish resists tarnishing and scratches.
Pros:
- Premium build quality
- Modern, sleek style
- Excellent leak resistance
Cons:
- Higher cost
- May require a plumber for installation
Verdict: Ideal for homeowners who want a spa-like bathroom. Check Price on Amazon.
Comparison Table
| Faucet | Key Features | Style | Price |
|---|---|---|---|
| Moen Adler | Pressure balancing, diverter spout | Modern | $$ |
| Delta Windemere | Traditional trim kit, WaterSense | Classic | $$$ |
| Grohe Concetto | Pressure balance, luxury finish | Luxury | $$$$ |
FAQ
1. Is it normal for a little water to come from the spout during a shower?
A tiny drip is normal, but a steady stream means the diverter needs attention.
2. Can I fix the diverter without replacing the faucet?
Yes, replacing just the spout often fixes the issue. If not, you may need a new faucet system.
3. Do I need a plumber to replace a tub spout?
Most homeowners can replace a screw-on or slip-on tub spout themselves with basic tools. Full faucet replacements may need a plumber.
4. How long do bathtub faucets last?
Typically 10–15 years with normal use. Hard water can shorten the lifespan.
Conclusion
A bathtub faucet that leaks when the shower is turned on usually points to a worn diverter. Replacing the tub spout is often a quick fix, but if your faucet is older, upgrading to a modern system is a better long-term solution.
Stop wasting water and restore your shower pressure — browse today’s best bathtub and shower faucets on Amazon and find the right upgrade for your bathroom.