Where should you fit Firesafe™ Cannula Valves/Firesafe™ Nozzles in an oxygen circuit with a cold water bubble humidifier? 

Firesafe™ Cannula Valves and Firesafe™ Nozzles should be installed downstream (of the normal oxygen flow), between the humidifier and the patient. There are no other particular or special requirements when fitting Firesafe™ Cannula Valves/Firesafe™ Nozzles in an oxygen circuit with a cold water bubble humidifier.