This is a 0-160 PSI gauge, not to be confused with the more common 0-60 gauge. This gauge is often used in Soda or carbonated water. It can also be used on the high pressure side of a secondary regulator when you are trying to watch for drop on a supply line. These are also often used on Air Compressors and other equipment. This gauge is right hand threaded, so can only be used on low pressure side of Taprite primary regulator. It can be used on high pressure side of of Taprite secondary and on either high or low pressure side of both primary and secondary CMB Regulators.