Stuck Bathtub Drain? Here’s the Proper Way to Remove the Drain Flange

The drain flange is the visible metal piece inside the bathtub drain opening. It connects to the drain pipe below and helps guide water into your plumbing system. Over time, soap scum, mineral deposits and general wear can cause the flange to corrode or tighten, making it difficult to remove. If the flange is stuck, forcing it out without proper technique can damage the tub’s surface or crack the drain pipe, which may lead to leaks. Learning how to remove bathtub drain flange properly ensures the new drain component fits securely and works efficiently. 

Signs Your Drain Flange Needs Replacement

A bathtub drain flange usually doesn’t need frequent replacement, but certain signs indicate it’s time for a new one. If you notice water draining slowly even after clearing hair or debris from the surface, the flange threads may be corroded or blocked. Rust stains around the drain opening often mean the metal is deteriorating. If you see leaks under the tub or water damage on the ceiling below the bathroom, the drain assembly may not be sealing properly. In many cases, replacing the flange fixes the issue without needing to redo the entire drain connection.

Preparing Before Removal

Before removing the flange, the area must be dry and safe to work around. Excess water around the tub floor or drain can cause slipping or difficulty gripping tools. It also helps to clean around the drain opening to remove soap residue or grime. Doing this prevents tools from slipping and reduces the chance of scratching the tub. Identifying the type of flange is also important. Many bathtub drains have cross bars inside the drain opening where a drain removal tool can grip. If the cross bars are broken or worn out, a different removal approach will be needed.

Tools You May Need

The most common tool used is a drain wrench or a smart dumbbell wrench specifically designed for bathtub drains. This tool fits into the drain opening and allows you to turn the flange without gripping the outer edges. If you don’t have one, a pair of locking pliers can sometimes work, but they increase the risk of scratching the metal or tub surface. Penetrating oil can help loosen corrosion on older drains. A hairdryer can also be useful because applying gentle heat to the metal can help break the bond caused by mineral build-up. Teflon tape will be needed later when installing the new flange to ensure a watertight seal.

Step-by-Step Approach to Removing the Drain Flange

Start by applying a small amount of penetrating oil to the edges of the flange and let it sit for a few minutes. This helps loosen corrosion or hardened minerals. Insert the drain wrench into the flange and make sure it fits securely. Turn the wrench counterclockwise slowly and steadily. Avoid sudden force because pushing too hard can cause the drain cross bars to snap. If the flange resists, apply gentle heat using a hairdryer for about a minute to help the metal expand slightly. Try again to loosen the flange.

If the cross bars inside the drain are damaged or break during the process, a different technique is necessary. One option is to use pliers to grip the outer rim of the flange carefully. You must grip tightly but avoid scratching the tub. Work slowly to loosen it. If it still won’t budge, you may need a drain extractor tool designed to remove flanges with stripped cross bars. These tools grip the inside walls of the flange and allow you to twist it out. Once the flange begins to move, continue turning until it lifts out completely.

Inspecting the Drain and Preparing for Installation

Once the old flange is removed, inspect the drain opening and the threads inside. If you see rust, mineral build-up or old plumber’s putty, clean it thoroughly. Use a cloth or small brush to remove residue. Check the rubber gasket underneath the tub if it is visible. If the gasket appears worn, brittle or cracked, it should be replaced. A damaged gasket can lead to leaks even if the flange is installed correctly. Make sure everything is dry before installing the new component.

Installing the New Drain Flange

Wrap Teflon tape around the threads of the new flange to ensure a watertight seal. Insert the flange into the drain opening and screw it in by hand at first to make sure it threads correctly. Use the drain wrench to tighten it securely, but avoid overtightening. The flange should feel snug and stable, with no wobbling. After installation, fill the tub lightly and check for leaks around and underneath. If you see moisture appearing below, lightly tighten the flange again or check if the gasket needs adjustment.

When to Call a Professional Plumber

While many homeowners can remove and replace a drain flange successfully, it’s not always simple, especially in older homes. If the flange is heavily corroded, if the drain assembly beneath the tub is rusted or fragile, or if you notice water damage, it may be safer to call a licensed plumber. Incorrect removal can crack the drain pipe, leading to more complex repairs. Plumbers have the proper tools and experience to handle stubborn flanges and ensure the connection is sealed properly to prevent future leaks.