The invention relates to a vehicle storage system with vapour control. The storage system comprises: a vehicle tank having a vapour outlet, a filter unit having a filter inlet and a filter outlet, a housing having a first port communicating with the vapour outlet, a second port communicating with the filter inlet, a third port communicating with the filter outlet and a fourth port. The storage system also comprises a closure body being moveably arranged in said housing, wherein said closure body is configured for: closing the third port and the fourth port in a first position of the closure body, creating in said housing a barrier between a first volume and a second volume in a second position of the closure body, said first volume forming a passage between the first port and the second port, and said second volume forming a passage between the third port and the fourth port, and closing the first port and the second port in a third position of the closure body.