If the flange is still stuck or the crossbars break, you must resort to a more destructive method. This is the point of no return for the old flange. Put on your safety glasses and protective gloves. Using a Dremel-style rotary tool equipped with a reinforced metal cutting wheel, carefully make two vertical cuts on opposite sides of the flange's interior wall. Cut from the top lip down towards the threads, but be extremely careful not to cut all the way through into the drain pipe threads or the surface of the tub. The goal is to weaken the flange. Once the cuts are made, insert a flathead screwdriver into one of the cuts and pry the section inward, toward the center of the drain. This should break the flange's tension and allow you to remove it in pieces. If you don't have a rotary tool, you can wrap a mini hacksaw blade in a rag to use as a handle and slowly saw through the flange wall, though this is much more difficult and time-consuming.
You're viewing a step from: How to Remove a Stuck Bathtub Drain Flange
This guide provides comprehensive, step-by-step instructions for removing a bathtub drain flange that is stuck due to age, corrosion, or hardened plumber's putty. The process begins with preparation and initial attempts using standard tools, then escalates to more advanced techniques involving penetrating oils, specialized drain wrenches, and, as a last resort, cutting the flange.
Frequently Asked Questions
What should I do if the drain key or wrench just slips, or the flange doesn't budge after applying penetrating oil?
If initial attempts fail, the flange is likely severely corroded or the putty is rock-hard. Apply more penetrating oil, like KROIL, and let it sit for several hours or even overnight to allow it to fully penetrate. If it still won't turn, your last resort is to carefully cut the flange using a rotary tool with a metal cutting wheel, making two opposing cuts without damaging the drain pipe threads.
Is it safe to cut the drain flange, and what precautions should I take?
Cutting the flange is a last resort and requires careful attention to safety. Always wear safety glasses and gloves to protect against metal fragments and sparks. Use a rotary tool with a metal cutting wheel, making two shallow, opposing cuts from the inside of the flange, being extremely careful not to cut into the drain shoe's threads below the flange.
How can I minimize the risk of damaging the bathtub or drain pipe during removal?
To prevent damage, protect the tub surface with a rag or towel if using a wrench or other tools that might slip. When cutting the flange, make shallow passes and continuously confirm you are only cutting the flange metal. Avoid excessive force, as that can warp the drain shoe or break connections further down the pipe.
Given this is a 'beginner' project, what are the most essential tools I absolutely need to have on hand?
Beyond basic safety gear, you'll definitely need a high-quality penetrating oil like KROIL, an adjustable wrench, and a specialized drain key or removal tool. For very stuck flanges, a rotary tool like the WEN 101-Piece Rotary Tool Kit with a metal cutting wheel (Stark 5 in. Metal Cut Saw Wheel) becomes essential. A putty knife and rags are also vital for preparation and cleanup.
How to Remove a Stuck Bathtub Drain Flange
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Step 1: Prepare the Work Area and Remove Stopper
Step 1: Prepare the Work Area and Remove Stopper
Step 1: Prepare the Work Area and Remove Stopper
Step 2: Apply Penetrating Oil
Step 2: Apply Penetrating Oil
Step 2: Apply Penetrating Oil
Step 3: Use a Drain Key for Removal
Step 3: Use a Drain Key for Removal
Step 3: Use a Drain Key for Removal
Step 4: Cut the Flange (Last Resort)
Step 4: Cut the Flange (Last Resort)
Step 4: Cut the Flange (Last Resort)
Step 5: Clean the Drain Threads and Surface
Step 5: Clean the Drain Threads and Surface
Step 5: Clean the Drain Threads and Surface
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