a sink support shell apparatus and method of making a sink support shell are provided . the sink support shell apparatus is a shell shaped to be compatible with the sink that is to be placed in the sink support shell . the sink support shell includes a rim for mounting the shell either above or below the countertop level . the shell further includes an overflow / vent channel and stand - off in the base for attaching the shell to the necessary plumbing fixtures to allow for drainage of the water from the sink . the overflow / vent channel is formed in the material of the shell and allows water to flow down the channel to be drained by the attached plumbing fixtures as well as air to be vented to reduce suction noise . the sink support shell is made of high - impact material , such as a metal or hard plastic material .