NF E29-138:1978 Flanged wall valves, at right angles, for controlling gas appliances, with tapered rotating section, for built-in brass piping and with G 1/2 connection.
1978NF E29-138:1978 Flanged wall valves, at right angles, for controlling gas appliances, with tapered rotating section, for built-in brass piping and with G 1/2 connection.