We stock every part for the Vapac WL Electrode style Steam humidifier ever made. Our technical support team can assist you should you have any questions about your Vapac WL Steam humidifier. Remember to replace your Vapac steam tank at least once per year for optimal operation. The Vapac WL steam humidifiers will bring up a warning sign when the steam tank fails. Unfortunately you must view the unit periodically to know when it is time. We recommend you replace the steam tank at least once per year for residential applications and more often for commercial and industrial humidification needs.