Drinking valves (10) with a plastics material housing (18) are susceptible to aggressive cleaning agents. The invention makes provision for increasing the wall thickness of the plastics material housing (18) somewhat by the wall thickness corresponding to at least 17% of the maximum inside diameter of the plastics material housing (18). In a surprising manner, it has been shown that a plastics material housing (18) having such a wall thickness is more resistant to aggressive cleaning agents than conventional drinking valves with a plastics material housing.
