Comprising a trough body made of stainless steel, material 1.4301 (304), with a contoured insulating flange for on-site bonding of the sealing material punched on one side. It allows for possible chamfering for installation near the wall. The water-impermeable sealing features a fleece surface for on-site incorporation in the insulating flange of the thin-bed seal. It includes a connection bracket for anchoring in screed and optional mounting feet with a central connection piece for the drain, which has an internal gradient to improve water runoff. Trough length: 1500 mm.