Drainage device with three degrees of protection of our own design, the intermediate closure of which is made in the form of a valve. Wear of the sealing gasket of the valve during the operation of the car is compensated by its additional pressing, which can significantly increase the service life of the gasket compared to a standard damper. Design features allow you to transport the widest possible range of products, which significantly reduces the empty mileage of the car. ortho-, meta-, para-), toluene, paraxylene, technical alcohol, ethylbenzene, MTBE, ethers, linear alkylbenzene, solvent, aromatic hydrocarbon fractions, etc.