Schlüter-KERDI-LINE-H  Complete set for horizontal linear drainage

The highly versatile Schlüter-KERDI-LINE-H can be universally used for intermediate installation in floors or at wall areas. The horizontal floor drain set stands out for its secure connection to the bonded waterproofing assembly with the integrated KERDI collar.

Set includes:

  • Corner seal (for lateral wall connection)
  • Two-part odour trap
  • Channel body with sealing collar
  • Drain body
  • Drain pipe
  • Channel support
  • DN 40 to DN 50 adapter (for KERDI-LINE-H 40 only)

Of course we also offer the matching grate and frame units as matching accessories for the floor drain set.

Product image KERDI-LINE-H 1©Schlüter-Systems KG
Cross-section drawing KERDI-LINE-H 1©Schlüter-Systems KG
Cross-section drawing KERDI-LINE-H 2©Schlüter-Systems KG
Cross-section drawing KERDI-LINE-H 3©Schlüter-Systems KG
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Product image KERDI-LINE-H 1
Cross-section drawing KERDI-LINE-H 1
Cross-section drawing KERDI-LINE-H 2
Cross-section drawing KERDI-LINE-H 3

General product information

What this product does

Schlüter-KERDI-LINE is a multi-piece, linear drainage system for creating floor-level showers with ceramic tiles, natural stone or coatings.

Schlüter-KERDI-LINE-H with horizontal drain features an integrated odour trap and a drain body. Height of channel support:

  • DN 40 (40 mm) = 78 mm
  • DN 50 (50 mm) = 97 mm

In the case of KERDI-LINE-H 50 and -H 40, the channel body is inserted into precisely fitting polystyrene channel support for quick and easy installation. Due to the drain design, the channel body and channel support of KERDI-LINE-V, -H 50 G2 and KERDI-LINE-F are permanently connected.

KERDI-LINE can be universally used for intermediate installation in floors or at wall areas.

Overview of further technical information:

  • Drain capacity: 0.5 l/s (DN 40) and 0.6 l/s (DN 50)
  • Water trap height: 25 mm (DN 40) and 30 mm (DN 50)
  • Width of cover incl. frame: 74 mm (DN 40 / DN 50)

Length of KERDI-LINE-H, -H 50 G2 and -V, -VS, -V 50 G2 linear drainage:

  • 50 cm to 180 cm (VOS = off-centre from 70 to 120 cm) in increments of 10 cm

The perimeter of the channel body consists of an adhesive flange with a pre-adhered KERDI collar.

It ensures the reliable connection of the channel body to the bonded waterproofing assembly, both in the floor area and on upright walls.

In conjunction with the waterproofing systems Schlüter-KERDI, Schlüter-DITRA, Schlüter-DITRA-HEAT or Schlüter-KERDI-BOARD and the matching system adhesives Schlüter-KERDI-COLL-L or Schlüter-KERDI-FIX, installers can create certified bonded waterproofing assemblies with connecting linear drainage.

Note: Schlüter-KERDI-LINE and frame assemblies must be installed with cement-based tile adhesives. The use of acetic-crosslinking silicone is not permissible on channels, frames and grates.

KERDI-LINE is a system component that complies with the German waterproofing standard DIN 18534. Together with the above-listed Schlüter-Systems it has general technical approval (abP) in Germany.

Please refer to the respective product data sheets for information about the moisture exposure classes according to abP. KERDI-LINE is a system component with European Technical Assessment (ETA) according to ETAG 022 (watertight covering kits). Schlüter products tested together with KERDI-LINE bear the CE mark.

Schlüter-KERDI-LINE-GTO is an odour trap with a silicone dry flap. It can be installed instead of a two-piece odour trap and prevents odours in situations when infrequent use of the drain (in guest bathrooms, holiday homes etc.) could result in the water in the odour trap unit from evaporating. With a drain capacity of at least 0.4 l/s (according to DIN EN 1253), the waterless odour seal can also permanently replace the standard odour trap unit, for example to prevent inadequate venting in the drain system (cannot be combined with KERDI-LINE-F / -VS / -VOS).


KERDI-LINE-H and -V can be installed as a complete assembly with the matching sloped tray Schlüter-KERDI-SHOWER-L with integrated KERDI-waterproofing (see product data sheet 8.8). The installation of a sloped screed is possible as well. The surface of the screed must be waterproofed with Schlüter-KERDI (see product data sheet 8.1), DITRA (see product data sheet 6.1) or DITRA-HEAT (see product data sheet 6.4).

Schlüter-SHOWERPROFILE-S and -R (see product data sheet 14.1) are supplementary components for creating a floor or wall connection. SHOWERPROFILE-S has a triangular design to conceal the sloped lateral edges of floor level showers. Waterproof the surrounding walls with Schlüter-KERDI (see product data sheet 8.1) or create a bonded waterproofing assembly with Schlüter-KERDI-BOARD (see product data sheet 12.1).


For soundproofing as specified in DIN 4109, VDI 4100, ÖNORM B 8115-2 or SIA 181, the Schlüter-KERDI-LINE-SR sound insulation panel complies with impact sound, installation noise and user noise limits in certified assembly variants of KERDI-LINE-H 40 and -H 50. Please refer to our KERDI-LINE-SR Planning Tool for further details.

How to install this product

The section below details the work steps to install the linear drainage systems.

Installation with low assembly height:

KERDI-LINE-H, -H 50 G2 and -F are designed to provide horizontal drainage to a floor level. KERDI-LINE-F with its low assembly height of only 60 mm is especially well suited for restoration and modernising projects. If drainage through a floor level is possible, a product such as KERDI-LINE-V allows for an assembly height ≥ 24 mm.


Horizontal drain

  1. Install the channel support on a level and plumbed substrate. In case of uneven surfaces or for height adjustment, you can also position the drain body precisely over adequately spaced spots of mortar or on a full levelling layer.

    In case of wall installation, align the channel body to match the thickness of the wall covering.

    For intermediate installation, use the supplied filling strip to symmetrically align the channel support.

    Note: Install the sound insulation membrane KERDI-LINE-SR and place an edge insulation strip in the edge area to optimise the sound insulation of the shower area.

    Loosely abut the sound insulation panels on the level solid ceiling. Verify that the imprinted side is facing up. Cover the joints with the joint tape Schlüter-DITRA-SOUND-KB to avoid sound bridges.

    Further installation details of certified system assemblies that comply with the sound insulation requirements of the applicable standards and guidelines can be found in the Planning Tool.

  2. Insert the channel body into the channel support - together with a drain pipe that is cut to the corresponding size - then connect the drain pipe to the existing drainage system of the building.

    Perform a water tightness test.

  3. Next, install the sloped tray Schlüter-KERDI-SHOWER-LT/ -LTS, abutting the precisely aligned drainage channel KERDI-LINE-H. The sloped tray must be installed at the proper height, flush with the upper edge of the channel support over a sufficiently load bearing levelling layer made of screed or bound fill (see product data sheet 8.8).

    As an alternative, you can install a sloped screed at the correct height, flush with the upper edge of the channel support.

  4. To attach the KERDI collar, apply the sealing adhesive KERDI-COLL-L (see product data sheet 8.4) to the adjoining waterproofing assembly, using a 3 x 3 or 4 x 4 mm notched trowel and fully embed the KERDI collar in the adhesive.

    The curing time of the adhesive must be observed. Create the wall connections with KERDI-KEBA sealing tapes that are adhered with KERDI-COLL-L.

What this product is made from

The channel bodies to a length of 120 cm are made of formed stainless steel V4A (material no. 1.4404 = AISI 316L). From a length of 130 cm, they are made of angled and welded stainless steel V4A (material no. 1.4404 = AISI 316L). The channel bodies have an adhesive flange with a pre-adhered KERDI collar. This material is a waterproofing membrane of soft polyethylene with a special fleece fabric laminated on both sides.

Depending on the type, the drain bodies are made of high-impact resistant polypropylene (PP) or acrylonitrile butadiene styrene (ABS).

The odour trap is made of fibre-reinforced polypropylene (PP).

The channel support is made of high impact resistant, expanded polystyrene (EPS).

Material properties and areas of application

The channel bodies, frames and grates are classified as K3 according to DIN EN 1253, Gullies for buildings. This class refers to areas without vehicle traffic, e.g. wetrooms in apartments, nursing homes, hotels, schools, and public washroom and shower facilities.

Channel bodies, frames and grates are suitable for wheelchair traffic.

KERDI-LINE in the brushed stainless steel V4A version (material no. 1.4404 = AISI 316L) is especially suitable for applications requiring resistance against chemical exposure and high mechanical stresses.

Even stainless steel of quality 1.4404 is not resistant to all chemical stresses such as hydrochloric and hydrofluoric acid or certain chloride and brine concentrations.

In certain cases, this also applies to seawater pools. The suitability of a proposed floor drain system must be verified based on the anticipated chemical, mechanical and/or other stresses. Aggressive cleaning products should not be used.

How to look after this product

The set includes a special cleaning brush with instructions for simple periodic cleaning of the odour trap and the channel body.

All cleaning agents must be free of hydrochloric and hydrofluoric acid.

Avoid contact with other metals, such as regular steel, to prevent corrosion. This also includes installation tools such as trowels or steel wool, e.g. for the removal of mortar residue.

Do not use abrasive cleaning agents on the sensitive surfaces (especially for EP = polished stainless steel).

We recommend the use of the stainless steel cleaning polish Schlüter-CLEAN-CP.