There’s nothing quite as frustrating as discovering that your bathtub faucet won’t turn off. That constant stream of water not only wastes resources but could also lead to higher utility bills or even water damage if left unresolved.

Fortunately, you don’t have to be a plumbing expert to figure out what’s wrong—or even fix it. With the right tools and a bit of guidance, many homeowners can troubleshoot and repair the issue themselves. In this guide, we’ll cover the most common reasons your bathtub faucet might stop working, how to fix it, and when to bring in a professional.

Why Your Bathtub Faucet Won’t Shut Off

Faucets aren’t made to last forever, and over time, their internal components can wear out. If your bathtub faucet won’t turn off, it’s likely due to one of the following issues:

1. Faulty or Stripped Handle

If the handle turns without resistance or doesn’t stop the water, it may be stripped or broken. A worn-out handle can’t properly control the valve that shuts off the water flow.

Solution: Remove the handle and check for damage. If it’s stripped or cracked, you’ll need to replace it. Most hardware stores carry universal or brand-specific replacements.

2. Worn Washer or O-Ring

Inside many faucet designs is a rubber washer or o-ring that seals the water flow when the faucet is turned off. Over time, these parts degrade—especially with constant exposure to heat, pressure, and minerals in the water.

Solution: Turn off your home’s water supply, remove the faucet, and inspect the washer. If it's brittle, cracked, or misshaped, replace it with an exact match.

3. Damaged Valve Seat

The valve seat is where the washer or cartridge sits. If it’s corroded, even a brand-new washer won’t fully stop the water flow.

Solution: If you can remove the valve seat, replace it. If not, you may need to replace the entire faucet assembly.

Step-by-Step: How to Fix a Bathtub Faucet That Won’t Turn Off

Before you reach out to a plumber, try these DIY fixes. They’re safe, effective, and often solve the problem without a hefty repair bill.

Step 1: Shut Off the Main Water Supply

Unlike sink faucets, bathtubs usually don’t have localized shut-off valves. You’ll need to turn off the water supply to the entire house. Look for the main shut-off valve near the water heater or utility room.

💡 Tip: After shutting off the water, open a sink faucet to release pressure in the lines.

Step 2: Remove the Faucet Handle

• Use a flathead screwdriver to pop off the decorative cap.

• Unscrew the handle screw with a Phillips screwdriver or Allen wrench.

• Gently pull the handle off. If it’s stuck, apply penetrating oil to loosen any corrosion.

Step 3: Inspect the Faucet Cartridge or Stem

Once the handle is removed:

• Take out the retaining clip or nut.

• Use pliers to remove the faucet cartridge or stem.

• Check the washer, o-rings, and cartridge for signs of damage or wear.

Tip: Bring the old parts to the hardware store to get the correct replacements.

Step 4: Reassemble and Test

• Install the new cartridge or washer.

• Reattach the clip or nut.

• Put the handle back on.

• Turn the water back on and check if the faucet shuts off properly.

If you’ve followed these steps and your bathtub faucet still won’t turn off, the issue may be more complex than expected—and it's likely time to consult a pro.

Should You Repair or Replace the Faucet?

If your faucet is relatively new and was originally a high-quality brand, a repair might make the most sense. But if it’s:

• Over 10 years old

• Starting to corrode

• Missing available replacement parts

…it may be more practical to replace the faucet altogether. Today’s models are more efficient and often easier to maintain, giving your bathroom a performance and aesthetic upgrade in one.

Prevent Future Plumbing Issues with Regular Inspections

A dripping faucet is annoying—but it could be a symptom of bigger plumbing problems you can’t see. Hidden leaks, high water pressure, and corrosion behind the walls can cause serious damage over time.

The Value of Annual Home Inspections

Regular home inspections are one of the best ways to catch small plumbing issues before they become major headaches. A qualified home inspector will evaluate everything from your roof to your bathtub faucet, looking for signs of wear, inefficiency, or potential failure.

At Guardian Angel Inspections, we specialize in detailed, whole-home inspections across South Florida. Our team takes a proactive approach, identifying plumbing issues early—so you don’t get blindsided by an unexpected leak or water damage.

✅ Schedule your inspection today: Call 561-512-7854 or fill out our contact form to book an appointment.

South Florida Focus: Local Help When You Need It Most

Homes in South Florida deal with unique plumbing challenges: mineral-rich water, tropical humidity, and hurricane-related wear. Whether you’re in Palm Beach Gardens, Delray Beach, or Fort Lauderdale, our team understands the local conditions that affect your home’s plumbing.

If you’re in the area and your bathtub faucet won’t shut off, don’t settle for a temporary fix. Let our experts inspect your systems to ensure everything’s functioning the way it should.

Final Thoughts: Don’t Ignore a Constantly Running Bathtub Faucet

If your bathtub faucet won't turn off, don’t ignore it. The longer it runs, the more you risk damage to your home—and your wallet. In many cases, a simple DIY repair can solve the issue. But if your faucet continues to leak or you suspect deeper plumbing problems, it’s smart to bring in professionals for a comprehensive inspection.

Take the Next Step

Protect your home from water damage and rising utility bills. If your bathtub faucet is acting up or you want peace of mind about your entire plumbing system, Guardian Angel Inspections is here to help.

📞 Call 561-512-7854 or schedule an inspection online to get started today