The HFT Qwik-Freezer Pipe Freezing Equipment employs liquid carbon dioxide (CO2) to rapidly freeze specific sections of pipe or tubing, creating a reliable ice plug with extremely low temperatures similar to dry ice. This ice plug effectively isolates the water within the system, enabling hassle-free repairs or alterations to be carried out without the need for system drainage or shutdown. FAQs 1. How do I know how much liquid CO2 I need? Be sure there is more than enough liquid CO2 on hand for the job (refer to the freezing table in the user instructions for the amount needed to complete the initial freeze only). If you intend to hold a freeze, extra cylinders will be needed. Use only cylinders fitted with a siphon tube or dip tube. 2. What condition does the pipe and water inside have to be in? Ensure there is no flow of water through the pipe, as flowing water will not freeze. The outside surface of the pipe must be clean of all foreign matter. Water should be at 20C (68F) or cold