Fixing a leaking Moen kitchen faucet is a relatively easy task that can be completed in a matter of minutes. In most cases, the culprit is a worn-out O-ring. The O-ring is a small rubber ring that sits between the base of the handle and the body of the faucet. 

Over time, these O-rings can become dried out or brittle, causing them to leak. Luckily, replacing an O-ring is a cheap and easy fix. But don't fret! In this blog post, we'll show you how to fix a leaking Moen kitchen faucet quickly and easily. 

With just a few tools and a little know-how, you'll have that pesky leak fixed in no time.

Tools and Materials Needed to Fix Leaking Moen Faucet:

• Adjustable pliers
• Allen wrench
• Flat head screwdriver
• Rubber gloves
• Moen replacement cartridge (can be found online or at a hardware store)
• White vinegar
• Replacement springs and gaskets

Instructions on How to Repair a Leaky Moen Kitchen Faucet

Video: How to Fix a Dripping Moen Faucet.

Shut Off the Water Supply

Before you do anything, you'll need to shut off the water supply to your Moen kitchen faucet. Locate the shut-off valves beneath the sink and turn them clockwise to close them.

Remove the Moen Faucet Handle

Once the water is shut off, you can remove the handle of your Moen kitchen faucet. Use an Allen wrench to remove the set screw that holds the handle in place. Once the set screw is removed, you should be able to pull the handle off. Lift the handle up straight to remove it from the faucet stem.

Before that, we have covered Kohler faucet removal.

Remove the Bonnet or Hex Nut

With the handle of your Moen faucet removed, you should be able to see a bonnet or hex nut. Use an adjustable wrench to remove this piece. If the bonnet is stuck, you may need to use a pair of pliers to get it started.

Remove the Collar of Moen Faucet

Under the bonnet, you will find a collar. This piece is threaded and can be removed by hand. Put on a rubber glove to increase traction, grip the collar on the top of the Moen faucet body and turn it counterclockwise. You may need to channel lock pliers to keep things moving.

Remove the Stem of Moen Faucet

Once the collar is removed, you should be able to pull the stem out of the Moen faucet. If it is stuck, you may need to use a pair of pliers. Remove the stem by pulling it straight up and out of its housing. Use pliers, if necessary, gripping the spindle at the top of the stem.

Remove the Ball, Gaskets, and Springs

The next step is to remove the ball, gaskets, and springs. The ball is located under the stem of your Moen kitchen faucet and is held in place by a screw-on cap. Unscrew the cap with a Phillips head screwdriver and pull out the ball. Remove the gaskets and springs from around the ball. Inspect all of these parts for any damage and replace them if necessary.

Remove Mineral Deposits

Mineral deposits can accumulate on the ball, seat washer, and in the Moen faucet body over time. Use a brush and white vinegar to remove any mineral deposits that may have built up. Removing mineral deposits is one of the incredible uses for white vinegar as it helps to soak the deposits. If the ball is cracked or chipped, replace it with a new one.

Install a New Seat and Spring

Once the ball, seat washer, and faucet body are clean and free of mineral deposits, you can install a new seat and spring. Start by inserting the seat into the Moen faucet body. Make sure it is seated correctly, and then screw on the retaining nut. Tighten the nut with a wrench until it is snug. For more information, read on how to tighten kitchen faucet?

Reinstall the Stem of Moen Faucet

Apply a small amount of plumber's grease to the o ring at the base of the valve stem. If possible, you can also replace the o ring, which is sometimes included in the Moen repair kit, or the entire stem. Fit the stem into its housing, aligning the tabs on the stem with the slots in the housing.

Push the stem all the way down until it stops. Reinstall the bonnet nut and tighten it carefully with pliers or an adjustable wrench. It should be snug but don't over-tighten, or you may damage the Moen faucet.

Check the Leaking and Reinstall the Handle

Turn on the water at the shut-off valves and check for leaks around the base of the Moen faucet. If necessary, use a wrench to tighten the packing nut slightly until the leak stops.

Replace the handle, making sure that it is in the correct position according to Moen's instructions. Some handles have an indicator line or arrow that must be aligned with the stem. Others are keyed so that they can only be installed in one position.

Turn on the water and check for leaks again. If necessary, repeat the previous steps until the leak stops.

Test Your Newly Installed Moen Faucet

Run your newly installed Moen faucet for a few minutes to make sure that it is working properly. Check for any leaks and make sure that the water pressure is adequate. If everything seems to be working properly, you have successfully installed your new Moen kitchen faucet. Note that Moen is one of the best kitchen faucets with sprayers, so it will be able to serve you for a long time without a fix.

FAQs on Fixing a Leaky Moen Kitchen Faucet

What are the most common causes of leaky Moen kitchen faucets?

There can be several reasons for a leaky Moen kitchen faucet, but the most common cause is a worn-out washer. Over time, the washer will become misshapen and no longer provide a tight seal. This can allow water to seep through, resulting in a drip or steady stream of water. 

How to find a repair kit for Moen kitchen faucets?

If you need a repair kit for your Moen kitchen faucet, you can find one at most hardware stores or online retailers.

What is the best way to clean Moen kitchen faucets?

To clean your Moen kitchen faucet, simply use mild soap and warm water. You can also use a soft cloth to wipe down the faucet. Avoid using harsh chemicals or abrasive cleaners, as these can damage the finish.

How to spot the model number on a Moen kitchen faucet?

The faucet comes with a tag that displays the model number along the cold water supply line of the faucet. The model number usually starts with P/N and usually follows this pattern… 6348-T4-AB

How to fix a leak in Moen kitchen faucets?

You can fix a leak in your Moen kitchen faucet by replacing the O-ring seals. These can be found in most repair kits. If the entire Moen kitchen faucet is faulty, then you’ll need to replace your Moen kitchen faucet if you have the knowledge and tools.

Final Thought on How to Fix a Leaking Moen Kitchen Faucets

Kitchen faucets are very important fixtures, so it's essential to know how to fix a Moen kitchen faucet if it starts to leak. By replacing the O-ring seals, you can easily repair most leaks. If your Moen faucet is still leaking, you may need to replace the entire unit.

Check out our chart below, which contains guides for leaking faucets other than Moen.