A system comprising: a water recirculating device comprising: an outlet configured to output treated water; a drain for collecting used water output from said outlet; a recirculating path in liquid communication with said drain and said outlet; a water treatment arrangement arranged in said recirculating path; a heating arrangement arranged in said recirculating path; an external water path arrangement in liquid communication with said recirculating path; and a valve arrangement configured to accept as inputs used water from said drain and temperature regulated water from said external water path arrangement, said valve arrangement being configured to direct said inputs towards said outlet and to mix said temperature regulated water with said used water from said drain; a mixing valve arrangement in liquid communication with said external water path arrangement, said mixing valve arrangement accepting as inputs hot and cold water from a hot and cold water source respectively, said mixing valve arrangement being configured to form said temperature regulated water by combining said hot and cold water, said mixing valve arrangement comprising a user input interface configured to control a proportion of said hot and cold water directed to said external water path arrangement; and a reference temperature determining arrangement configured to determine a reference water temperature of said temperature regulated water; wherein said heating arrangement is configured to adjust a water temperature of said treated water towards said reference water temperature; wherein said water recirculating device is configured to discard at least part of said used water via a drain discard path if the used water is below a quality threshold; characterised in that said quality of the used water is determined in the drain by a sensor arrangement configured to determine a water quality, wherein said system is configured to be in a first state wherein a reference flow of said temperature regulated water is allowed to enter said valve arrangement, and a second state wherein a refill flow of said temperature regulated water is allowed to enter said valve arrangement in response to said used water being below the quality threshold. a water recirculating device comprising: an outlet configured to output treated water; a drain for collecting used water output from said outlet; a recirculating path in liquid communication with said drain and said outlet; a water treatment arrangement arranged in said recirculating path; a heating arrangement arranged in said recirculating path; an external water path arrangement in liquid communication with said recirculating path; and a valve arrangement configured to accept as inputs used water from said drain and temperature regulated water from said external water path arrangement, said valve arrangement being configured to direct said inputs towards said outlet and to mix said temperature regulated water with said used water from said drain; an outlet configured to output treated water; a drain for collecting used water output from said outlet; a recirculating path in liquid communication with said drain and said outlet; a water treatment arrangement arranged in said recirculating path; a heating arrangement arranged in said recirculating path; an external water path arrangement in liquid communication with said recirculating path; and a valve arrangement configured to accept as inputs used water from said drain and temperature regulated water from said external water path arrangement, said valve arrangement being configured to direct said inputs towards said outlet and to mix said temperature regulated water with said used water from said drain; a mixing valve arrangement in liquid communication with said external water path arrangement, said mixing valve arrangement accepting as inputs hot and cold water from a hot and cold water source respectively, said mixing valve arrangement being configured to form said temperature regulated water by combining said hot and cold water, said mixing valve arrangement comprising a user input interface configured to control a proportion of said hot and cold water directed to said external water path arrangement; and a reference temperature determining arrangement configured to determine a reference water temperature of said temperature regulated water; wherein said heating arrangement is configured to adjust a water temperature of said treated water towards said reference water temperature; wherein said water recirculating device is configured to discard at least part of said used water via a drain discard path if the used water is below a quality threshold; characterised in that said quality of the used water is determined in the drain by a sensor arrangement configured to determine a water quality, wherein said system is configured to be in a first state wherein a reference flow of said temperature regulated water is allowed to enter said valve arrangement, and a second state wherein a refill flow of said temperature regulated water is allowed to enter said valve arrangement in response to said used water being below the quality threshold.