Use and Care Guide
Note: Product listings and certifications can
be referenced on page 15.
Installation
The installation instructions below represent
the use of KERDI-DRAIN and KERDI-LINE
in floor applications. Installation instructions
for the use of KERDI-DRAIN and KERDI-
LINE in shower applications can be found
in the Schluter
®
-Shower System Installation
Handbook.
KERDI-DRAIN
Preparation
After locating the correct position, cut a
hole in the substrate for the drain outlet and
coupling to the waste line using the template
provided. Note: Fill in box-outs in concrete
floors with dry-pack mortar. A pipe coupling
or similar can be used as a form around the
waste line. Select form to accommodate the
drain outlet and mechanical no-hub coupling
(when applicable). Limit the diameter of the
hole to 5" (125 mm) maximum to ensure
proper support of the tile assembly. A larger
hole can lead to lack of support and damage
the tile assembly (e.g., cracked grout around
drain).
Drain installation
Access to plumbing from below
If there is access to the plumbing from below
and the waste line can be connected after
installing KERDI-DRAIN, the drain can be
installed in conjunction with the mortar bed.
1. Place a ring of loose mortar up to
the inlet hole in the floor and firmly
press the drain into the mortar. The
bonding flange must be fully supported
to prevent damage to the tile assembly
(e.g., cracked grout around drain). When
installing KERDI-DRAIN over wood
substrates, the minimum thickness of
mortar required at the perimeter of the
bonding flange is 1" (25 mm).
2. The screed is then placed flush with the
top of the bonding flange of the KERDI-
DRAIN. Slope the mortar bed using the
bonding flange and mortar screeds as
guides.
No access to plumbing from below
When there is no access to the plumbing
from below, install the KERDI-DRAIN to the
appropriate height prior to the installation of
the shower base.
1. Begin the drain installation by dry fitting
the components. Measure and cut a
section of pipe to connect the KERDI-
DRAIN to the odor trap below the floor,
using the foam spacers included with
the drain as a spacer. When installing
KERDI-DRAIN over wood substrates, the
minimum thickness of mortar required at
the perimeter of the bonding flange is
1" (25 mm).
2. Prepare the odor trap, cut section of
pipe, and KERDI-DRAIN with cleaner,
primer and ABS or PVC cement per
the solvent cement manufacturer's
instructions and connect. Use a no-hub
coupling for stainless steel drains with
no-hub outlets, and thread sealing
compound or tape for stainless steel
drains with threaded outlets.
3. Pack loose mortar under the drain up
to the inlet hole to ensure solid and
uniform support of the bonding flange.
The screed is then placed flush with the
top of the bonding flange of the KERDI-
DRAIN. Slope the mortar bed using the
bonding flange and mortar screeds as
guides.
Clamping ring drain already installed
If a clamping ring drain is already installed,
the drain must be replaced with KERDI-
DRAIN or converted using the KERDI-DRAIN
adaptor kit.
1. If using the KERDI-DRAIN adaptor kit,
remove the clamping ring from the
installed drain and save the bolts for
installation of the adaptor ring. Align the
bolt pattern of the clamping ring with
the matching punch-outs in the adaptor
ring. Punch the matching inserts out
through the stainless steel adaptor ring.
2. Apply a continuous 1/4" - 3/8" (6 -
10 mm) bead of KERDI-FIX to the
underside of the adaptor ring. Align the
holes in the adaptor ring with the bolt
holes in the installed drain and place the
adaptor ring on the installed drain flange.
Re-insert and tighten the bolts using a
star pattern. Bolts are to be finger-tight
plus 1/4 turn; do not overtighten, as this
may warp the adaptor ring and result
in leaks.
3. Slide the adaptor flange into the adaptor
ring and ensure full support under the
adaptor flange with mortar. The screed
is then placed flush with the top of the
bonding flange of the KERDI-DRAIN.
Slope the mortar bed using the bonding
flange and mortar screeds as guides.
Note: Schluter
®
-Systems strongly
recommends a leak test be performed on
the connection between the drain and waste
line prior to continuing on with the remainder
of the installation whenever possible. Refer
to local plumbing and/or building codes for
any specific requirements in your area.
Connection to waterproofing
membranes
The KERDI or DITRA waterproofing
membranes can be installed over the mortar
bed as soon as it can be walked upon.
KERDI
1. Apply Schluter SET™, Schluter ALL-
SET™, Schluter FAST-SET™ or
unmodified thin-set mortar to the
bonding flange and surrounding
mortar bed with a 1/4" x 3/16" (6 x
5 mm) V-notched trowel or the
KERDI-TROWEL, which features a
1/8" x 1/8" (3 x 3 mm) square-notched
design. The thin-set mortar must be
mixed to a fairly fluid consistency, but
still able to hold a notch.
Note: When using the stainless
steel bonding flange, the membrane
is bonded to the integrated bonding
flange with KERDI-FIX adhesive/sealant.
The stainless steel bonding flange
must be clean and free of grease or
other contaminants prior to KERDI-FIX
application.
2. Embed KERDI in the bond coat and
work the membrane onto the KERDI-
DRAIN bonding flange and mortar bed
with the flat side of the trowel to ensure
full coverage and remove air pockets.
The membrane is carried to the step in
the bonding flange (template provided).
DITRA or DITRA-XL
1. DITRA or DITRA-XL is installed up to the
outer edge of the KERDI-DRAIN bonding
flange. Apply Schluter SET™, Schluter
ALL-SET™, Schluter FAST-SET™ or
unmodified thin-set mortar to the mortar
bed surrounding KERDI-DRAIN with a
1/4" x 3/16" (6 x 5 mm) V-notched
trowel or the DITRA-TROWEL, which
features an 11/64" x 11/64" (4.5 x
4.5 mm) square-notched design. The
thin-set mortar must be mixed to a
fairly fluid consistency, but still able to
hold a notch. Solidly embed the matting
into the bond coat using a float, screed
trowel, or DITRA-ROLLER.
2. DITRA or DITRA-XL is sealed to the
KERDI-DRAIN bonding flange using a
cut section of the KERDI membrane.
Apply Schluter SET™, Schluter
ALL-SET™, Schluter FAST-SET™
or unmodified thin-set mortar to the
bonding flange and surrounding
membrane with a 1/4" x 3/16"
(6 x 5 mm) V-notched trowel or the KERDI-
TROWEL, which features a 1/8" x 1/8"
(3 x 3 mm) square-notched design.
Note: When using the stainless steel
bonding flange, the KERDI is bonded to
FLOOR DRAINS
3