Installation Guide
Remove the clamping ring from the installed 
drain and save the bolts. Align the bolt 
pattern of the clamping ring with the adaptor 
ring and punch the matching inserts through 
the adaptor ring.
1
Apply a continuous 1/4" - 3/8" (6 mm - 10 
mm) bead of KERDI-FIX to the installed 
drain flange. Place the adaptor ring on 
the installed drain, re-insert the bolts, and 
tighten evenly. Make bolts finger-tight plus 
1/4 turn; over tightening may warp the ring 
and result in leaks.
2
Slide the adaptor flange into the adaptor ring 
and ensure full support under the adaptor 
flange with mortar. The mortar bed is then 
placed according to the instructions on 
page 25.
Note: For the KERDI-DRAIN 7-1/2" Adapter 
Kit, the extended adapter bonding flange 
may be cut to length.
3
Clamping Ring Drain Installed:  If a clamping ring drain is installed, replace with KERDI-DRAIN or convert using the KERDI-DRAIN adaptor kit.
Note: Schluter
®
-Systems strongly recommends a leak test be performed on the 
connection between the drain and the waste line prior to continuing with the 
remainder of the installation whenever possible. Refer to local plumbing and/or 
building codes for any specific requirements in your area.
SPACER SELECTION
ATTENTION! 2 sizes of spacers are included.
Use the GREY spacers 
for shower tray models:
KST915BF 
KST965BF 
KST1220BF 
KST965/1525 
KST1830 
KST1220/1830 
For shower tray 
KST965-1525S:
Use the WHITE spacers if tray 
perimeter height is 1-1/2" (38 mm)
OR
Use the GREY spacers if tray 
perimeter height is 1-1/8" (28 mm)
KST1525 
KST965/810BF 
KST915/1220BF 
KST1220/1525
KST965NABF
26  SPACER SELECTION










