A negative pressure wound therapy system, comprising: - a negative pressure source, - a wound cover member having a suction interface, - a wound side assembly connected to the suction interface, the wound side assembly comprising: - a fluid removing conduit, - an air supplying conduit, and - a wound side connector connected to the fluid removing conduit and the air supplying conduit, and - a connector device, comprising: - a connector housing having a connector housing device side and an opposite connector housing coupling side, - a fluid outlet connected to the connector housing, - an air filter, - an air feeding port connected to the filter, - air feeding conduit comprising the air feeding port and an air inlet opening, the air inlet opening arranged on the connector housing device side, and - coupling means, wherein: - the fluid outlet is connected to the negative pressure source, - the connector device is adapted to be connected to the wound side connector at the connector housing coupling side, - the coupling means is adapted to engage with the wound side connector to: - fluidly connect the fluid removing conduit to the fluid outlet, and - fluidly connect the air supplying conduit to the air feeding port to allow ambient air to be supplied at a controlled air leakage rate to the air supplying conduit through the air filter. - a negative pressure source, - a wound cover member having a suction interface, - a wound side assembly connected to the suction interface, the wound side assembly comprising: - a fluid removing conduit, - an air supplying conduit, and - a wound side connector connected to the fluid removing conduit and the air supplying conduit, and - a fluid removing conduit, - an air supplying conduit, and - a wound side connector connected to the fluid removing conduit and the air supplying conduit, and - a connector device, comprising: - a connector housing having a connector housing device side and an opposite connector housing coupling side, - a fluid outlet connected to the connector housing, - an air filter, - an air feeding port connected to the filter, - air feeding conduit comprising the air feeding port and an air inlet opening, the air inlet opening arranged on the connector housing device side, and - coupling means, - a connector housing having a connector housing device side and an opposite connector housing coupling side, - a fluid outlet connected to the connector housing, - an air filter, - an air feeding port connected to the filter, - air feeding conduit comprising the air feeding port and an air inlet opening, the air inlet opening arranged on the connector housing device side, and - coupling means, - the fluid outlet is connected to the negative pressure source, - the connector device is adapted to be connected to the wound side connector at the connector housing coupling side, - the coupling means is adapted to engage with the wound side connector to: - fluidly connect the fluid removing conduit to the fluid outlet, and - fluidly connect the air supplying conduit to the air feeding port to allow ambient air to be supplied at a controlled air leakage rate to the air supplying conduit through the air filter. - fluidly connect the fluid removing conduit to the fluid outlet, and - fluidly connect the air supplying conduit to the air feeding port to allow ambient air to be supplied at a controlled air leakage rate to the air supplying conduit through the air filter.