I feel the drain has many short comings; the ability to clean the drain is a concern and the waterproofing and installation steps worrisome on a couple points. In the installation guidelines it shows cutting the kerdi corners (tight wall instal) and I do not like this idea. I have built many wonderful showers with Kerdi and would suggest for a linear drain installation you invest in some Kerdi Fix for those cut Kerdi pieces.
Water entering the drain should be able to flow in my opinion between the tile and the grill or grate. I think this framed grill of the Schluter line drain restricts hair and soap from dropping down at this point.
|Kerdi Line Drain Cover|
|Tight fit on sides|
I do not like the large size of this brush and personally prefer a smaller brush - more like the type used for hand washing glasses. I think care should be to fold the trim around the grill when applying upward pressure.
Here is a closer look at the frame detail.
Again a little more thought to design would have gone a long way. Each one of the supports is a place to snag hair and cleaning the bottom side is difficult with such a large brush.
The design on the drain base is solid and is both wedged and internally sloped to a 2" no hub fitting. The waterproofing is factory applied and very secure. I know because I yanked on it.
By far the greatest install of the Kerdi Line drain is by Hugo. Here is a peak at two fine installations.
UPDATE March 2013
I went out to look at a recent Kerdi Line Drain installation last week and was a little surprised to see rust forming inside the drain's channel body. There was two distinct rust lines and a number of rusting spots.
I borrowed a 3M pad from the homeowners and managed to buff out these rust spots. Rust should not form inside these drains and it's a scary thought that a showerdrain that is rarely used is rusting in the first year of installation.
Make sure that all material is cleaned from the inside of the drain after the renovation is completed. It is poossible that this rust formed from filing dust from the plumber installing the shower fixtures.
I'm going to leave my Kerdi Line drain outside for a spell and see what happens to it.