A combination aeration, deaeration, and water outlet valve, the valve comprising:
- a common water inlet, gas inlet, and gas outlet for connecting to a climate chamber,
- a water reservoir connected to the common water inlet, gas inlet, and gas outlet, wherein the water reservoir is connected such that water entering from the common water inlet, gas inlet, and gas outlet into the water reservoir is conducted under force of gravity in a direction towards a bottom of the water reservoir,
- a first valve assembly, disposed in a first valve compartment, with a first valve seat penetrated by a first passage and with a first closing element pressed by a first closing force onto the first valve seat such that it blocks the first passage until the first closing force is overcome, wherein the first passage leads directly or indirectly from the first closing element to an air inlet,
- a second valve assembly, disposed in a second valve compartment, with a second valve seat penetrated by a second passage and with a second closing element pressed by a second closing force onto the second valve seat such that it blocks the second passage until the second closing force has been overcome, and
- a drainage opening for air and water, disposed at a height of an upper edge of the second valve seat, wherein the drainage opening forms a direct or indirect connection between the second valve compartment and an outflow for air and water, wherein the second passage of the second valve seat is directly or indirectly connected with the water reservoir such that water collecting at the bottom of the water reservoir can enter into the second passage, and
- wherein a direct or indirect connection is provided between the water reservoir and the first valve compartment above a maximum water level of the water collecting in the water reservoir.