System that solves the problem of laying high and low thickness floors (stone, marble, porcelain stoneware, etc.) by no longer having the frames that constrain the height of the floor.


Tecnochannel Flat is the new product of the Malagrida Group company which was created specifically for problems in building renovations where heights are always limited.

With a minimum thickness of 3 mm and a standard height of 7 cm, Tecnochannel Flat is positioned as a reference point in the sphere of low thickness linear drainage. Remaining with an attractive and innovative design and with all the technical solutions to have a simple and easy-to-install product, this model is the ideal solution where there is not enough space in the floor package.

TECNOCHANNEL Flat is an advanced 100% watertight linear drainage system that allows surface water to drain. It is suitable for paved structures in both internal and external environments. The system is made of plastic material and is made up of modules of 1.50 ml continuously connected to each other.

The section and the internal slope of the TECNOCHANNEL Flat drainage channels improve the flow rate of the water and the consequent self-cleaning force so that the accumulation of debris on the bottom of the channel is avoided. The material and the form of construction make TECNOCHANNEL Flat very light, with all the logistical advantages that this entails.

TECNOCHANNEL Flat has an internal slope, so the elements can be laid flat, facilitating and improving the “installation” operations. Perimeter of the channel body there is a flap on which a felted fabric is applied that allows the attachment of the insulation in the field of thin bed techniques. The frames on the channel and those on the special pieces are in AISI 316L stainless steel.

The TECNOCHANNEL Flat system is completed with suitable and perfectly compatible special pieces such as: exhaust terminals, heads, AISI 304 stainless steel grids and accessories for perfect water tightness. N.B. on request the grids can be in AISI 316L stainless steel. The channel can be easily inspected and cleaned.


    • Water collection
    • Water drainage
    • Rainwater drain
    • Water drainage for terraces and balconies
    • Airtight plastic pool
    • Water collection before rain
    • Water drains for wellness centers
    • Drains for meteoritic waters
    • Drainage channel
    • Water collection channels
    • For floors of any thickness
Sistemi di drenaggio a basso spessore per tetti piani


The mounting and installation instructions detailed in the following “Technical Data Sheet” are provided exclusively as examples to allow the final installer to follow the best recommendations for installation. Special mountings or special needs should be evaluated by Malagrida Group s.r.l. in accordance with the designer. Running a successful commissioning of the system is necessary to ensure the system (channel-grid) a longer life and a better water flow.

1 corretto assemblaggio

1. Correct assembly

2 canale assemblato e poste per il canale

2. Assembled channel and quote (distance of a point from a predetermined horizontal plane) for the channel

3 canale poggiato sulle poste

3. Channel rested on the quote

4 posizionamento di un peso in corrispondenza delle poste

4. Placement of a weight at the quote

5 realizzazione cassero

5. Formwork realization

6 cassero finito

6. Finished formwork

7 particolare del cassero nel punto dello scarico

7. Detail of the formwork at the point of discharge

8 massetto realizzato

8. Realized screed

9 posa impermeabilizzazione con guaina fisica e bandella perimetrale

9. Laying waterproofing with physical sheathing and perimeter banding

10 posa impermeabilizzazione con guaina liquida e bandella perimetrale

10. Laying waterproofing with liquid sheathing and perimeter banding

11 posa piastrelle su FLAT con dime

11. Laying tiles on FLAT with templates

12 posa piastrelle su sistema FLAT

12. Laying tiles on FLAT system

13 posa piastrelle su sistema FLAT.jpg

13. Laying tiles on FLAT system

16 lavoro finito sistema FLAT

14. Finished work FLAT system

17 particolare lavoro finito sistema FLAT

15. Detail of finished work FLAT system

Step 1

Check that the lip-round seals are placed in their housing at the ends of the channel and are not deformed.

Step 2

Assemble the channels after having lubricated the male joint with the approved lubricant, ensuring to put the flat seal between the channels. The flat seal has to adhere perfectly with the mounting flange of the channels. Position the galvanized iron connecting plates outside the mounting flange of the channels, and fasten the channels with the screws and bolts provided, making sure of tightening the bolt using a “criss-cross” sequence, without tightening too much to avoid spilling the flat seal. This incorrect fastening can compromise the waterproofing of the system. To make the assembly easier, we suggest to undertake the above mentioned phases of assembly with the channels upside down. It is recommended to perform the assembly on flat surfaces. To complete the assembly with elements like the end caps and the drain terminals carefully repeat Phases 1-2.

Step 3

Put the channel into the position of use. Important Note: If the channel is more than 3 meters long, more installers are required in order to avoid any abnormal twists to the channel. Lay the channel at the project height and make the screed with the grid already mounted. Note: use only pipes with o-rings seal. Once the previous steps have been carried out correctly, we recommend to flood the channel system to check its waterproofing.

Step 4

Run structural fluid cement mortar along the canal’s formwork or trunk (as shown in the diagram) with a minimum thickness of 5cm along the sides of the felted fins, making sure to evenly spread the cement on the outside in the same manner. Please note: The step described above must be carried out once the grid has been installed. This operation is vital because it prevents the canal from expanding during freezing and thawing cycles (temperature changes).

Step 5

Connect the channel with the drainage system (with the proper size and slope). Please note: Use only pipes with o-rings waterproof seal.

Step 6

Build the screed up to the cemented formwork or trunk, careful not to ruin the fabric present on it because it can lower the subsequent effectiveness of the waterproofing of the system. We recommend protecting the fabric. Any waterproofing must be carried out by applying the felted fin following the instructions supplied by the manufacturer of the waterproofing system. It is necessary, however, in order to connect the waterproofing system and the channel, to apply the strip junction (ARTICLE INF/BAND) listed in the catalogue/price list.

Step 7

Only for Infinity and Tecnochannel (NO FLAT)

Step 8

To proceed to the FLAT system flooring installation, insert the template in the channel.

Step 9

Lay the flooring taking care to ensure it adheres correctly to the template (without a joint), proceed in the same way for the full length of the channel, moving the template each time.

Step 10

Flooring the cover grid. Apply the layer of adhesive, full-bed, on the grid. Place the cover grid in its seating inside the channel, then lay the tile (width 9.6 cm).

Step 11

To level the floor with the tile laid on the cover grid, use the specific double spacer that can be used to level the tile just by pressing down with your hands.

Step 12 and 13

The spacer has two different heights: 2 or 3 cm.

In case of flooring with a thickness of less than 2 cm, use the spacer with the shorter bottom section.

In case of flooring with a thickness of more than 2 cm, use the spacer with the longer bottom section.

Bevel (chamfer) the tile / marble / stone, in proximity to the run-off joint.


The mounting and installation instructions detailed in the following “Technical Data Sheet” are provided exclusively as examples to allow the final installer to follow the best recommendations for installation. Special mountings or special needs should be evaluated by Malagrida Group s.r.l. in accordance with the designer. Running a successful commissioning of the system is necessary to ensure the system (channel-grid) a longer life and a better water flow.


To correctly use the examples of laying patterns shown below, it is advisable to follow these simple tips as it will be much easier to find the right article and size for your work.

  1. Identify the Infinity linear channel meters you need for your work.
  2. Identify the position of the drain points and the diameter offered by your balconies / terraces / paving / penthouses, etc. to be able to slope the channel towards them making you help from the dotted line on the drawings of the diagrams.
  3. Choose the Infinity duct that is most suitable for your work taking into consideration points 1 and 2.


  • Please follow the instructions for installation contained in this catalogue.
  • The product and its use are designed for domestic use. For other applications or special conditions check with the Malagrida technical department or your specifier.
  • The system supports the use of running hot water only for short periods and for temperatures not exceeding 90°C.
  • Do not use chemical cleaners to remove possible deposits inside the channel.
  • The stainless steel surfaces must be maintained and cleaned following standard stainless steel careindications. Do not use cleaning products containing hydrochloric acid and hydrofluoric acid. Do not clean with spatulas or steel wool. The system is suitable for waterproofing with liquid primers or insulation compounds for thinbed installations.
  • Infinity system should be scaled according to the total area of drainage.
  • The channel must be periodically cleaned to prevent dirt deposit.
  • It is made of plastic (ABS) and therefore sensitive to certain petrol by-products.

Note: Malagrida Group reserves the right to modify the specifications contained herein without prior notice. The indications of this catalogue, which stern from installation experience, are purely indicative. Malagrida Group disclaims all liability for its use.

tecnochannel flat


Supply and installation of Tecnochannel FLAT waterproof double slit drainage conduit. (Art. TCNF/C150, TCNF/C300). The above conduit is made in polypropylene (top-quality plastic). Minimum thickness 3 mm, standard height 7 cm with internal slope and infinitely modular. The body of the conduit is reinforced by fins, both longitudinally and transversely, which give it rigidity and strength, while peripherally, on the outer top, it is equipped with a felted fabric permitting the mechanical attachment of the waterproofing system. Note: To perform the connection between the waterproofing system and the conduit follow the manufacturer’s instructions of waterproofing products and always use the junction strip (art. INF / BAND12). The tileable type grid in the upper part is provided with a felted fabric that allows the mechanical attachment of the tile using commercially available adhesives.

Note: Follow adhesive manufacturer’s directions in order to use the correct adhesive. The conduit-grating system presents two drain slits sized 8 mm, and it is provided with drain terminals (Art. TCNF/50A, TCNF/50B, TCNF/SD50) and end pieces (TCNF /T100) compatible with the conduit by means of a male/female coupling equipped with lip seal and through a mechanical flange equipped with an additional flat silicone seal, reinforcement plates, screws and bolts.