RapidPure RapidConnect Bulk Head works with the Trail Blazer Ultra Light System by RapidPure. The bulk head includes two sealing washers and a wing nut (hose, clamp, and pail are not included). The Connect Bulk Head is a necessary component of the Trail Blazer Ultra Light system. RapidPure captures viruses that are too small for our competitors' filter to capture, making it the best in class. This Bulk Head comes with a Reservoir Bag.