In 1948 a class of eight water tankers numbered 12151-12158 was built. They used ex RAAF tanks on new chassis. The tanks were rather large in diameter (7'-6⁵/₈") and I suspect that they were rather unstable as they did not last long.

In 1950 12151, 12152, 12158 were written off followed by 12155 in 1954. The remaining wagons became QJG class flat wagons in 1959. The records indicate that new QJG class wagons numbered 12151, 12152 were turned out in 1962 but I suspect that these were resurrections of the written off JG's.

Both photos courtesy A Gunzburg

The JG tanks seem to have been used as static tanks after the conversion of the JGs. The chassis, after life as QJGs, went on to be a JOBs.

Former JG class tank

The WAGR outline diagram is shown below.