A tank vent is necessary to ensure permanent pressure equalisation in the tank. For a reliable and easy to install tank vent, we offer straight or bend tank vents on a 13mm or 25mm hose for our water tanks, plastic tanks, PE tanks etc. The hose to be connected is routed straight or bend upwards and needs to be secured. This always ensures a constant level of air in the tank. Especially for mobile use of our water tanks in combination with a 20cm tank lid without venting, this reliable system has proven itself over the long term and also functions as a classic overflow.