The various Australian railway systems occasionally sold redundant locomotive components for non-railway purposes, such as  boilers to sawmills or other industrial concerns, and tenders for use as grounded water or oil tanks.  Some of these relics remain to this day and provide some interest to ferroequinologists! 

An example of an old steam locomotive tender tank adapted for farm use is this ex-Victorian Railways specimen to be found at Donnybrook, north of Melbourne.

My thanks to Andy Galloway for providing the images shown on this page.