Abstract: A member with a first body having a through hole along a longitudinal axis thereof along which a beverage is fed from a percolation chamber. A first cup-shaped body is axially aligned under the first body, and a ball, which stops the flow of the beverage under the bias of a spring, is between the hole and the inside of the first cup-shaped body until the beverage reaches a given pressure. A second cup-shaped body houses the lower part of the first body and the first cup-shaped body and internally defines a chamber. A first through window is defined in the first cup-shaped body under the stopping zone of the flow in the hole; and a second through window is defined in the second cup-shaped body, through which contact between the beverage and air is made and is suited to feed the beverage from the chamber outwards.

Abstract: A member with a first body having a through hole along a longitudinal axis thereof along which a beverage is fed from a percolation chamber. A first cup-shaped body is axially aligned under the first body, and a ball, which stops the flow of the beverage under the bias of a spring, is between the hole and the inside of the first cup-shaped body until the beverage reaches a given pressure. A second cup-shaped body houses the lower part of the first body and the first cup-shaped body and internally defines a chamber. A first through window is defined in the first cup-shaped body under the stopping zone of the flow in the hole; and a second through window is defined in the second cup-shaped body, through which contact between the beverage and air is made and is suited to feed the beverage from the chamber outwards.