Abstract: A device for controlling flow of a fluid, comprising: a first valve comprising: a selectively openable inlet: an opening: a selectively openable outlet, arranged such that fluid may enter the first valve through the inlet, exit the first valve through the opening, enter the first valve through the opening and exit the first valve through the outlet: a first sensor for detecting a fluid: a second sensor for detecting a fluid, the first sensor and second sensor in fluid communication with the first valve via the opening: a controller for receiving signals from the first sensor and second sensor and for controlling opening and closing of the inlet and outlet in response to receiving said signals, arranged to allow, in use, a fluid to flow through the device by flowing: - into the first valve through the inlet of the first valve: - out of the first valve through the opening of the first valve: - past the first sensor for detecting a fluid: - to the second sensor for detecting a fluid: - into the first valve throu