When a new sewer overflow bathtub water set, which includes the drain pipe that connects the adapter to the sewer inlet of the main tub, is installed, you must also install a new adapter. Home improvement or plumbing supply stores sell full bath overflow and drain assemblies, including the overflow drain cover and adapter. When installing the assembly, you need to take your time and running could result in leaks that lead to damage at home water.
Enter the handles of a pair of channel locks on the gates of the old adapter then screw a large screwdriver through handles canal locks. Use a hammer and chisel to create a notch in the upper lip of the adapter if it has a grid on it. Remove the screws that hold the overflow bathtub of the tub cover in place then pull the cover of overflow. Eliminate any coupling system connected to the back cover overflow pipe.
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The drains from the tub from the basement or on the wall behind the tub. Loosen the connection between the main drain pipe and overflow bathtub drain Assembly and then delete the old overflow and drain assembly. Assemble the new Assembly overflow and drain, hand-tighten connections. Place the overflow and drain again Assembly under the bath and tighten the connection between the Assembly and the drain.