Pro-Slope from the Noble Co. is designed with the Uniform Plumbing Code in mind. The UPC requires a slope of 1/4-inch per foot to the drain under the waterproofing in shower receptors. Pro-Slope, the company says, creates the required slope.
Made from expanded polystyrene, Pro-Slope comes in a ready-to-use kit that includes a patented Positive Weep Protector.
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