Drain pipe adapter

The ornamental design for drain pipe adapter, as shown.

FIG. 1 is a top perspective view of a drain pipe adapter, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top perspective view of a second embodiment, showing my new design; and,

FIG. 4 is a bottom perspective view thereof.

Patent	Priority	Assignee	Title
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2430976,
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176640,

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