The Series GTG Gas Test Gages possess psi scale with 3-2-3% ANSI B40.1 Grade B accuracy. The 2" GTG gages are designed with black steel housings. Wetted parts include a brass socket and Bourdon tube. Units can withstand temperature of -40 to 160°F (-40 to 71°C). Typical installer test ranges are available such as 15, 30, 100 and 160 psi. Three styles of connections are available: vertical or horizontal hex-shaped chrome plated steel connections in 1/2", 3/4" or 1" female NPT; also in the same female NPT sizes is a bell shaped connection. All connection blocks feature a valve for system pressurization.