Anti-siphon with valve

Plastic material anti-siphon with pressure valve.When the entry point of cooling water into the drain is at a height of less than cm 15 above the waterline, there is a danger that, when the engine is turned off, cooling water will enter the engine due to the siphon effect. It is placed at least cm. 40 above the waterline. Universal hose holder Ø mm. 13-19-25-32.