A tap assembly 10 with a hollow tap body 16 which defines a dispensing chamber 24 leading to an outlet arrangement 26. A valve assembly with a valve element 18 is provided to selectively open an inlet into the dispensing chamber 24. A push button 20 is provided which operates the valve assembly, and which defines an operating chamber 28, with the push button movable into the operating chamber. A connecting member is provided extending from the push button 20 through the operating chamber. A seal 39 is provided to prevent liquid passing from the dispensing chamber 24 to the operating chamber.