CombiSteel 7075.0125 Horizontal Outlet Drainage Channel Installation Guide

Step 1: Site Preparation and Channel Positioning

Determine the required height for the drainage channel. The distance between the top of the existing concrete subfloor and the anticipated finished floor level should ideally match the total height of the drainage channel. If this distance is greater, the installation requires the use of adjusting feet. For this, four pieces of M8 bolts and eight pieces of M8 nuts are needed. The length of these bolts must be specified according to the required height difference.

If adjusting feet are to be used, first attach the M8 bolts and nuts to the designated points on the drainage channel body, as illustrated.

Position the drainage channel at the intended location.

Adjust the height of the drainage channel precisely. The top edge of the drainage channel should be set 0.5-1.00 mm below the anticipated finished floor level to ensure proper integration with the final flooring.

Diagram Description (Page 2): Visuals show the drainage channel body with threaded rods (bolts) and nuts installed to act as adjustable feet. These feet are depicted resting on the subfloor, allowing for height adjustment of the channel body before concrete is poured.

Step 2: Connecting to the Drainage System

Connect the drainage channel's outlet to the existing PVC pipework. It is crucial to ensure that the connection provides the required slope for efficient water flow and that the angle of flow is appropriate.

Diagram Description (Page 3): This page shows the drainage channel connected to a PVC pipe. A side view illustrates the channel's outlet connecting to the pipe, highlighting the necessary slope. A top-down view shows the channel body and the outlet connection, with a 45° angled PVC fitting shown, indicating the direction of the pipe connection.

Step 3: Concrete Support and Curing

Pour approximately 30-40 mm of concrete around the base and supporting feet of the drainage channel. Allow this concrete to cure completely. During the curing process, ensure the drainage channel remains undisturbed.

Diagram Description (Page 4): A side view illustrates the drainage channel in place, with concrete being poured around its base and supporting feet. The concrete layer is shown to be about 30-40 mm thick. The diagram also visually reinforces the required slope of the channel.

Step 4: Final Concrete Fill and Finishing Touches

Fill the remaining gaps around and underneath the drainage channel with concrete. This fill should be done gradually, ensuring a smooth and level top surface that integrates seamlessly with the surrounding floor.

Tiling is the final step in completing the floor surface around the drainage channel.

Before installing the filter element and the grate, thoroughly clean the entire surface of the drainage channel to remove any debris.

Important: Ensure the rubber plug is always fitted in the outlet unless it is temporarily removed for maintenance purposes.

Diagram Description (Page 5): Depicts the completed installation, showing the drainage channel fully encased in concrete with a smooth top surface, ready for tiling. It also shows the filter element and grate being placed into the channel, and the rubber plug in its functional position within the outlet.