Designing Kitchens and Bathrooms - sealing supply opening in floor

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jaz50y
10-26-07, 07:00 AM
I am swapping out a pedestal sink, and the supply and drain pipes come up from the floor. Because of the construction, they cannot be relocated. At present all three pipes come through a single hole. Is there a recommended way to seal this hole so that water getting behind the sink will not run down it? It is about 4" square.