How to Fix Leaking Dual Handle Faucets

A persistent leak in your kitchen faucet isn’t just an annoyance—it can waste hundreds of gallons of water over time and lead to long-term damage if left unresolved. If you own a dual handle faucet, understanding the structure and identifying the source of the leak are essential first steps toward resolving the issue efficiently. Whether your faucet is a standard two-handle model or a high-end bridge faucet, most leaks can be fixed without replacing the entire fixture.

In this guide, we’ll break down the most common reasons your dual handle faucet might be leaking and walk you through quick, effective solutions to restore your faucet’s function and appearance. If you’ve invested in an unlacquered brass kitchen faucet or any other premium model, timely repair is also key to preserving the finish and preventing internal wear.

Why Is My Dual Handle Faucet Leaking?

Dual handle faucets typically control hot and cold water independently, using two valves that mix water into the spout. While this setup offers precise temperature control, it also doubles the potential for leaks. Let’s look at where and why leaks happen.

1. Worn-Out Washer or O-Ring

• Location of leak: Dripping from the spout

• Cause: Rubber washers and O-rings wear down due to friction and water pressure

• Solution: Disassemble the handle, remove the valve stem, and replace the washer or O-ring

2. Loose Packing Nut

• Location of leak: Around the base of the handle

• Cause: The nut securing the faucet stem can become loose with use

• Solution: Use an adjustable wrench to gently tighten the packing nut beneath the handle

3. Corroded Valve Seat

• Location of leak: Spout base

• Cause: Mineral buildup or corrosion on the valve seat where the washer seals

• Solution: Remove and clean the valve seat with a seat grinder or replace if heavily damaged

4. Faulty Cartridge or Stem

• Location of leak: From the handle or spout

• Cause: The internal stem or cartridge may be cracked or clogged with debris

• Solution: Replace the cartridge or stem with a manufacturer-approved part

Step-by-Step: How to Fix a Leaking Dual Handle Faucet

Follow these steps to troubleshoot and fix a leaking faucet in your kitchen:

Step 1: Turn Off the Water Supply

Locate the shutoff valves beneath your sink and close both the hot and cold water lines. Open the faucet to release pressure and any remaining water.

Step 2: Remove the Faucet Handle

Use a screwdriver or Allen key to remove the set screw holding the handle in place. Carefully pull off the handle to expose the inner valve assembly.

Step 3: Inspect the Washer, Cartridge, or Stem

• Unscrew the packing nut and pull out the stem or cartridge

• Check for signs of wear, corrosion, or mineral buildup

• Soak reusable parts in vinegar to clean or replace them with new components

Step 4: Replace Worn Parts

Match the replacement washer, O-ring, or cartridge to your faucet’s make and model. Apply plumber’s grease to rubber parts before reinstalling.

Step 5: Reassemble and Test

Reassemble the faucet in reverse order. Turn the water supply back on and test the handles. The leak should be fully resolved—if not, double-check for overlooked wear or seating issues.

Understanding Compression vs. Cartridge Faucets: Why It Matters When Fixing Leaks

Not all dual handle faucets are built the same—and understanding what type you have can help you identify the correct repair method, choose the right replacement parts, and avoid unnecessary damage.

What’s the Difference?

Compression Faucets

Compression faucets are the traditional type of two-handle faucet. They control water flow using a compression stem with a washer at the bottom. Turning the handle tightens or loosens the washer against the valve seat to control water flow.

• Common in vintage or classic bridge faucets

• Often used in unlacquered brass kitchen faucets

• Washers wear down over time, leading to leaks at the spout

• Typically require more maintenance than newer designs

Cartridge Faucets

Cartridge faucets use a valve cartridge that opens and closes to regulate water flow. These are more common in modern dual handle faucets and are easier to operate and maintain.

• No washers involved—leaks are usually due to worn cartridges or O-rings

• Provide smoother handle movement

• Faster and easier to repair (simply replace the cartridge)

• Less prone to leaks around the handles

How to Tell Which Type You Have

To determine if your dual handle faucet is a compression or cartridge type:

• Turn the handle: If it spins multiple times, it’s likely a compression faucet. If it turns only 90 or 180 degrees, it’s likely cartridge-based.

• Remove the handle: Inspect the inner mechanism—if there’s a washer and screw, it’s compression; if there’s a plastic or brass cartridge, it’s cartridge-based.

Knowing this not only helps you fix a leaking faucet faster—it also ensures you buy the correct replacement parts. You can find quality brass-compatible parts that match both systems in most home improvement stores, or by contacting the manufacturer of your faucet.

Insideast Tip:

If you’re using a bridge faucet or other heritage fixture from Insideast, chances are you’re working with a traditional compression faucet, built for both function and long-term repairability. Check out our Best Bridge Faucets of 2025 for durable designs that are made to be maintained—not thrown away.

Pro Tips for Brass & Bridge Faucets

If your leaking faucet is a bridge-style or unlacquered brass model, it’s especially important to take care when disassembling and cleaning it. These fixtures are often handcrafted, and their finishes can be sensitive to abrasives and harsh chemicals.

• Use only brass-safe cleaners – Avoid bleach or ammonia.

• Clean and dry regularly – Especially around base seals and joints.

• Read our full guide on cleaning brass with household products for more tips.

Looking to install a new faucet or replace a worn bridge model? See our step-by-step bridge faucet installation guide to get started.

How to Prevent Leaks in the Future

Once you’ve fixed the leak, take a few proactive steps to keep it from returning:

1. Regularly Clean the Aerator and Spout

Mineral deposits can cause pressure buildup and internal leaks. Unscrew the aerator and soak it in vinegar monthly to prevent clogs.

2. Don’t Over-Tighten Handles

This wears out washers and O-rings prematurely. Turn handles firmly but gently to prevent unnecessary friction and damage.

3. Use a Water Softener If You Have Hard Water

Hard water accelerates corrosion, especially in brass kitchen faucets. Installing a softener extends your faucet’s life and reduces the risk of leaks.

4. Routine Inspections

At least twice a year, check your faucet handles, base, and connections for early signs of wear, dripping, or movement.

When to Replace Your Faucet Instead of Repairing

Sometimes fixing a leak isn’t worth the hassle—especially if the fixture is:

• Over 10 years old

• Made from lower-quality materials

• Repaired multiple times already

• Starting to corrode or tarnish beyond restoration

If that’s the case, browse our curated unlacquered brass kitchen faucet collection or explore all our premium fixtures in the Insideast full catalog. Our faucets are crafted to combine timeless design with modern reliability.

Conclusion

Fixing a leaking dual handle faucet doesn’t have to be intimidating. By identifying the source of the leak whether it’s a worn washer, corroded valve seat, or faulty stem—you can solve most issues in under an hour with just a few basic tools. And when you maintain your faucet properly, you’ll avoid common failures altogether.

Looking for a long-term upgrade that blends performance and heritage craftsmanship? Explore our range of handcrafted bridge and brass faucets and keep your kitchen stylish, functional, and leak-free for years to come.