Use and Care Guide
INNOVATIVE SOLUTIONS FOR CERAMIC AND STONE TILE
FLOOR DRAINS FOR BONDED WATERPROOF MEMBRANES
Schluter
®
-KERDI-DRAIN and Schluter
®
-
KERDI-LINE floor drains provide a 
simple and secure connection to bonded 
waterproof membranes at the top of the 
assembly via an integrated bonding flange.  
Thus, the membrane is applied entirely at 
the surface, with all water directed into the 
top of the drain.
Application and Function
Schluter
®
-KERDI-DRAIN and Schluter
®
-KERDI-
LINE are specifically designed for use in 
bonded waterproofing assemblies, such as 
showers, steam rooms, wet rooms, bathroom 
floors, commercial kitchen floors and other 
applications that require waterproofing and 
drainage.
8.2 Schluter
®
-KERDI-DRAIN is a floor drain 
specifically designed to allow connections 
to Schluter
®
-KERDI or other load-bearing, 
bonded waterproof membranes. The 
membrane is adhered to the large integrated 
bonding flange to form a waterproof 
connection at the top of the drain assembly.   
KERDI-DRAIN consists of a drain casing and 
fully adjustable grate assembly or covering 
support to which tile is applied. The grate 
assembly accommodates a wide range of 
tile thicknesses and allows lateral and tilt 
adjustment as well. The covering support is 
placed flush with the top of the bonding flange 
and can therefore accommodate any thickness 
tile covering.
The standard KERDI-DRAIN is attached 
directly to the waste line. The drain casing 
is available in ABS, PVC, or stainless 
steel. The plastic drain casings feature a  
fleece-covered bonding flange. They are 
available with standard 2" (50 mm) and  
3"  (75 mm) outlets and attached to the pipe 
using an appropriate solvent cement. The 
stainless steel drain casings are available with 
standard 2" (50 mm) and 3" (75 mm) no-hub 
outlets and 2" (50 mm) threaded outlet. The 
no-hub outlets are attached to the pipe using 
an appropriate mechanical (e.g., flexible or 
no-hub) coupling. The threaded outlets are 
attached to the pipe using thread sealing 
compound or tape. The simple connection to 
standard drain outlets makes KERDI-DRAIN 
suitable for new construction and renovation.  
The KERDI-DRAIN adaptor kit is designed 
to convert clamping ring drains by equipping 
them with an integrated bonding flange. The 
adaptor kit includes a stainless steel adaptor 
ring with an over-molded rubber gasket and 
a variety of perforated hole patterns that align 
with most common clamping ring shower 
drains. The adaptor ring replaces the clamping 
ring and is attached to the drain body using the 
clamping ring bolts. This connection is made 
watertight via the rubber gasket and Schluter
®
-
KERDI-FIX adhesive/sealant. The integrated 
bonding flange slides into the adaptor ring, 
with the over-molded rubber gasket ensuring 
a watertight seal. KERDI-DRAIN ADAPTOR 
KITS, available in 5-1/4" (133 mm) and 7-1/2" 
(191 mm) diameter sizes, are used to convert 
traditional clamping ring drains to integrated 
bonding flange drains when removal of the 
clamping ring drain is not practical (e.g., when 
they are set in concrete slabs). Adaptor kits 
are suitable for both mortar beds and KERDI-
SHOWER-T/-TS/-TT shower tray applications.   
The KERDI-DRAIN grate assembly consists 
of a frame, which can be seamlessly adjusted 
to the thickness and layout of the ceramic tile 
or stone covering via the height adjustment 
FLOOR DRAINS
8.2 Schluter
®
-KERDI-DRAIN
4-23/32" - 120 mm
2-1/4" -
57 mm
7/8" -
22 mm
7/8" -
22 mm
15/16" - 24 mm
5-15/32" - 137 mm
2-1/4" -
57 mm
7/8" -
22 mm
7/8" -
22 mm
15/16" - 24 mm
Intermediate placement
Wall placement
8.7 Schluter
®
-KERDI-LINE










