Conbraco chain lever water gauge for use on large boilers with inconvenient columns, which is rated to 250 psig at 400°F and to 500 psig at 100°F. This gauge has a pipe size of 1/2", a glass OD of 5/8", and a glass length of 12". The lever on a standard 12" chain allows operator to open and close valves that would be beyond reach. The valve stem operates on quarter-turns. High pressure glass and PTFE reinforced gauge glass gaskets are standard.