Laundry treatment appliance comprising: a rigid tub for containing laundry treatment liquids, the tub comprising a tub outlet for draining the treatment liquids therefrom, a manifold comprising a manifold inlet coupled with the tub outlet for receiving said treatment liquids, and a gasket ( 150-550 ) arranged between said manifold inlet and said tub outlet for sealingly coupling thereof, the laundry treatment appliance further comprising a floating valve ( 155-555 ), pivotally hinged to said gasket ( 150-550 ), adapted to swing between a closed position wherein the floating valve ( 155-555 ) abuts a valve seat ( 150s-550s ) associated with the gasket ( 150-550 ) thereby impeding the passage of the treatment liquids from said tub to said manifold , and an opened position wherein the floating valve ( 155-555 ) is at least partially spaced from said valve seat ( 150s-550s ) thereby allowing the treatment liquids to pass from said tub to said manifold , said floating valve ( 155-555 ) and said valve seat ( 150s-550s ) having different rigidity; wherein said floating valve ( 155-555 ) is provided with at least one wall that extends from a rear side of said floating valve ( 155-555 ) opposite to an abutment side thereof, said at least one wall delimiting one or more air capturing chambers ( 155 C i , 355 C i , 455 C i ) adapted to capture air thereby enhancing floating of said floating valve (155-555 ) . . characterized in that said at least one wall comprises a rectilinear wall portion arranged in proximity to an hinging region ( H ) of said floating valve ( 155-555 ) to said gasket ( 150-550 ), and substantially parallel to an hinge axis ( X H ) of said floating valve ( 155-555 ) to said gasket ( 150-550 ), said rectilinear wall portion hindering, during floating valve ( 155-555 ) opening, the escaping from said one or more capturing chambers ( 155 C i , 355 C i , 455 C i ) of the air captured therein. a rigid tub for containing laundry treatment liquids, the tub comprising a tub outlet for draining the treatment liquids therefrom, a manifold comprising a manifold inlet coupled with the tub outlet for receiving said treatment liquids, and a gasket ( 150-550 ) arranged between said manifold inlet and said tub outlet for sealingly coupling thereof, the laundry treatment appliance further comprising a floating valve ( 155-555 ), pivotally hinged to said gasket ( 150-550 ), adapted to swing between a closed position wherein the floating valve ( 155-555 ) abuts a valve seat ( 150s-550s ) associated with the gasket ( 150-550 ) thereby impeding the passage of the treatment liquids from said tub to said manifold , and an opened position wherein the floating valve ( 155-555 ) is at least partially spaced from said valve seat ( 150s-550s ) thereby allowing the treatment liquids to pass from said tub to said manifold , said floating valve ( 155-555 ) and said valve seat ( 150s-550s ) having different rigidity; wherein said floating valve ( 155-555 ) is provided with at least one wall that extends from a rear side of said floating valve ( 155-555 ) opposite to an abutment side thereof, said at least one wall delimiting one or more air capturing chambers ( 155 C i , 355 C i , 455 C i ) adapted to capture air thereby enhancing floating of said floating valve (155-555 ) . . characterized in that said at least one wall comprises a rectilinear wall portion arranged in proximity to an hinging region ( H ) of said floating valve ( 155-555 ) to said gasket ( 150-550 ), and substantially parallel to an hinge axis ( X H ) of said floating valve ( 155-555 ) to said gasket ( 150-550 ), said rectilinear wall portion hindering, during floating valve ( 155-555 ) opening, the escaping from said one or more capturing chambers ( 155 C i , 355 C i , 455 C i ) of the air captured therein. <EOS>