Use and Care Guide

ManualsBrandsSchluter Systems ManualsBathroomKerdi-Drain Grate 4-in Matte White Curve

FLOOR DRAINS

Metallic-coated grates are stainless steel 304

with a metallic coating created using physical

vapor deposition (PVD). The resulting metallic

film is very hard and corrosion-resistant.

Textured color-coated grates are stainless

steel with a powder coat.

Anodized aluminum grates feature

an anodized layer that retains a uniform

appearance during normal use. The surface

may be damaged by grout or setting material.

Therefore, these materials must be removed

immediately.

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

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.