Abstract: A two-way valve having a central body with a first end and a second end, the central body has a first internal valve and a second internal valve, the first internal valve enables the passage of a fluid along a first internal path only in the direction that goes from the second end to the first end of the central body, when a first fluid pressure threshold is exceeded, and the second internal valve enables the passage of a fluid along a second internal path only in the direction that goes from the first end to the second end of the central body, when a second fluid pressure threshold is exceeded, characterized in that a first axis of symmetry of the first internal path and a second axis of symmetry of the second internal path are parallel to each other and parallel to a longitudinal axis of the central body.