To remove a stubbornly seized bathtub drain flange, start by spraying penetrating oil around the threaded edges and letting it sit for 30 minutes to dissolve mineral scale. Insert a specialized tub wrench or the handles of two heavy pliers into the crossbars of the drain opening to gain maximum leverage, and turn counterclockwise. Callout type="warning" title="Hygiene Warning": Wear sturdy work gloves and eye protection in case old metal crossbars snap under extreme torque. Verification: Inspect the exposed threads on the waste shoe for damage before installing a new drain flange.
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