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AMERDRAIN sheet and combination drains eliminate hydrostatic pressure against foundation walls or under floor slabs, by providing a secure flow channel from grade to footer. The molded core has a filter fabric securely bonded to each dimple allowing water to freely pass while restricting soil particles.  The sheet drain is placed against the full surface area of the vertical wall and connects directly into the combination drain.  Combination drains function as a perimeter drain and are designed to handle the high flow capacity of water collected by the sheet drains.  The impervious core of both products provide protection to the waterproofing membrane during backfill and eliminates the need for a protection course. The result is a highly efficient, sustainable, cost effective system designed for long term performance.