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(ssk-501d Ultra) Mark E Industries Shower Kit With Pan Liner & Square Drain

   GOOF PROOF SHOWER Installation System. Goof Proof Products - YouTube. Video will open in a new window. Standard Shower Kit SSK-501 ULTRA. 1 x (4 1/2' top) Shower Drain/Square. 1 x SPL/40/6 Pan Liner (6' x 5'). 1 x Pre-Pitch Kit STD-201. Pre-Pitch is a unique, stay-in-place spreading tool designed for use underneath shower pan liners. Pre-Pitch is a unique tool that creates the proper sub floor slope needed underneath the pan liner to manipulate the water towards the weep holes that are integral part of shower floor drains. By having a pitch under the pan liner, water that passes ...