Drainage valve used for connections of drinking water outlets in seasonal use. Allows effective removal of water from the system and its protection for the winter season. When laid in the ground, it is essential to ensure the possibility of drainage from the pipeline to be drained (e.g. siphon, drainage). Sealing system: When the valve is fully or partially open, the drainage opening is closed; when fully closed, the valve drains automatically; do not use with ground water level above the drainage opening! The internal threads are fitted with a corrosion protection ring. The set comprises a telescopic housing with an installation length of 1.3-1.8 m and a PE box.