A double valve (110, 210, 310) comprising: a first unitary valve assembly (111, 211, 311) including a first port (194, 292, 394), a second port (189a, 294, 392), and a first spool (180, 280, 380); a second unitary valve assembly (112, 212, 312) including a third port (195, 291, 389), a fourth port (189b, 289, 391), and a second spool (181, 281, 381); a first pilot assembly coupled to the first unitary valve assembly (111, 211, 311); a second pilot assembly coupled to the second unitary valve assembly (112, 212, 312); at least one exhaust port (190, 191, 287, 387) that is part of at least one of the first unitary valve assembly (111, 211, 311) and the second unitary valve assembly (112, 212, 312); and a first common outlet passage (140a, 240, 341) coupled to the fourth port (189b, 289, 391), and a second common outlet passage (140b, 241, 340) coupled to the second port (189a, 294, 392); wherein, when the first spool (180, 280, 380) and the second spool (181, 281, 381) are in a first position, fluid flows through the first common outlet passage (140a, 240, 341) thereby flowing from the first port (194, 292, 394) through the fourth port (189b, 289, 391), and when the first spool (180, 280, 380) and the second spool (181, 281, 381) are in a second position, fluid flows through the second common outlet passage (140b, 241, 340); characterised in that the fluid flows from the second port (189a, 294, 392) through the third port (195, 291, 389) or from the third port (195, 291, 389) through the second port (189a, 294, 392), when the first spool (180, 280, 380) and the second spool (181, 281, 381) are in the second position and the fluid flows through the second common outlet passage (140b, 241, 340). a first unitary valve assembly (111, 211, 311) including a first port (194, 292, 394), a second port (189a, 294, 392), and a first spool (180, 280, 380); a second unitary valve assembly (112, 212, 312) including a third port (195, 291, 389), a fourth port (189b, 289, 391), and a second spool (181, 281, 381); a first pilot assembly coupled to the first unitary valve assembly (111, 211, 311); a second pilot assembly coupled to the second unitary valve assembly (112, 212, 312); at least one exhaust port (190, 191, 287, 387) that is part of at least one of the first unitary valve assembly (111, 211, 311) and the second unitary valve assembly (112, 212, 312); and a first common outlet passage (140a, 240, 341) coupled to the fourth port (189b, 289, 391), and a second common outlet passage (140b, 241, 340) coupled to the second port (189a, 294, 392); wherein, when the first spool (180, 280, 380) and the second spool (181, 281, 381) are in a first position, fluid flows through the first common outlet passage (140a, 240, 341) thereby flowing from the first port (194, 292, 394) through the fourth port (189b, 289, 391), and when the first spool (180, 280, 380) and the second spool (181, 281, 381) are in a second position, fluid flows through the second common outlet passage (140b, 241, 340); characterised in that the fluid flows from the second port (189a, 294, 392) through the third port (195, 291, 389) or from the third port (195, 291, 389) through the second port (189a, 294, 392), when the first spool (180, 280, 380) and the second spool (181, 281, 381) are in the second position and the fluid flows through the second common outlet passage (140b, 241, 340).