Easy Valve Housing Set for the Volcano The Easy Valve Filling Chamber Housing for Storz & Bickel Volcano is an Original Equipment Manufacturer (OEM) replacement component for the Volcano with the Easy Valve system. This product is intended for those whose device chamber housing is broken. Broken plastic prohibits the proper function of your chamber housing, but fortunately, with this quality spare, your unit will function like new. This affordable product consists of two main parts: the Filling Chamber Housing and the Filling Chamber Cap.