Wall Placement KERDI-Line | Wall to Drain-Center
2” minimum from drywall to center of the water line. Make sure the hole in the subfloor for the channel body does not exceed the diameter of the template included in the packaging’s literature. Photos below are taken right from our pricebook.
From the outside edge of the stainless steel flange to the dip into the channel body, the total flange width is 7/8”. If a metal grate is used, the width of the metal grate frame is 3/8”, which leaves 1/2” remaining of flange. This is noted in the photo below. NOTE: the KERDI membrane has been torn from the stainless steel flange as this photo shows a flange that I re-use for demonstration purposes. Do not install a flange that has the KERDI membrane removed. This is to note the dimensions from above.
Most ceramic and porcelains are 3/8” thick. With a compressed bond coat of 1/8”, you will be at 1/2” finished wall assembly, which is the amount remaining on the flange in order to accommodate the metal grate. Thus, you may want to give yourself a buffer and install the channel body at 2 1/2” - 3” from tile wall substrate, especially when wall tile is greater than 3/8” thick.