An inside view shows the simple "works" within the triclover fitting, liquid inside the wand and gas outside the wand. The standard stainless steel compression rings/sleeves in the bore-through compression fitting have been replaced with silicone o-rings which seal with minimal tightening on the nut and never attach to the tubing permanently. These replacement o-rings allow the racking wand to slide up and down through the compression fitting while maintaining the seal.