| 摘要 |
A drain assembly for a sink or the like employs a plastic sleeve below a retaining flange, the periphery of the sleeve being provided with several groups of flexible fins extending out therefrom parallel to its axis, the fins of each group being located at successively increasing distances from the retaining flange. The assembly can be installed by one person from above the sink or the like simply by pushing it down into the drain aperture with a twisting motion until at least some of the fins in each group tightly engage the under surface of the drain aperture, the fins thereby readily accommodating both stainless steel and cast iron sinks or the like of various wall thicknesses.
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