From the latter it passes through the dry purifier J to the service-pipe.
The gas passes from the gasholder through a purifier H charged with puratylene, to the service-pipe.
The gas passes from the gasholder through a purifier K, charged with heratol, to the service-pipe.
The gas passes through a washer in the gasholder tank, and then through an outside scrubber to the service-pipe.
From the gasholder the gas passes through the purifier D, charged with heratol, to the service-pipe.