Introduction

Faucet cartridges control water flow and temperature in many modern faucets. When a cartridge wears out, homeowners may notice dripping, reduced water pressure, or difficulty adjusting temperature. Replacing a faulty cartridge is often an effective and affordable repair.

Common Signs a Cartridge Has Failed

A steady drip when the faucet is turned off is the most common sign. Other symptoms include stiff handles, inconsistent water temperature, or water continuing to flow after the handle is closed. Mineral buildup and normal wear are typical causes.

Tools and Preparation

Before starting, identify the faucet brand and model so you can purchase the correct replacement cartridge. Turn off the water supply under the sink and open the faucet to relieve pressure. Basic tools include a screwdriver, adjustable wrench, needle nose pliers, and plumber’s grease.

Step by Step Cartridge Replacement

Remove the decorative cap and handle screw, then lift off the handle. Unscrew the retaining nut and carefully pull the cartridge straight out. Insert the new cartridge in the same orientation, apply a small amount of plumber’s grease, and reassemble the faucet.

Testing the Repair

Slowly turn the water supply back on and test the faucet. Check for leaks and confirm smooth handle movement and proper temperature control.

When DIY Is Not Enough

Older faucets may have cartridges that are seized due to corrosion. Forcing removal can damage the valve body. In these cases, a professional plumber can safely remove the cartridge or recommend faucet replacement if needed.

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