Geruchsverschluß

An odour trap (1) is located in a pipe piece (2) for a drainage. The odour trap (1) is made from a yieldably deformable material. The odour trap (1) comprises a tubular member (3) and a barrier means (4) integrally formed with said tubular member. A lateral outlet opening (6) is provided in the tubular member (3). The barrier means (4) is through a peripheral edge (4a) integrally formed with the tubular member (3) along its entire circumference. The barrier means (4) extends obliquely downwards in the tubular member (3) to the lateral opening (6) and brings about, with those portions (4aa) of the peripheral edge (4a) which communicate with said lateral outlet opening, a preferably gas-tight engagement with the inner side (2a) of the pipe piece (2). At least the barrier means (4) is to a varying extent displaceable by preferably liquid flowing into the odour trap (1) for permitting passage thereof between said portions (4aa) of the peripheral edge (4a) of the barrier means (4) and the inner side (2a) of the pipe piece (2) and, after passage of the liquid, returning to the engagement with the inner side of the pipe piece