Tank Wagon

[[File:Basic_Train_Endless.png|thumb|240x240px|Basic starting train when playing endless. from left to right: Crafter, Storage, Tank and standard steam engine.

Both the tank wagon and the bucket will be filled up when it's raining.

Level 1

Level 2

Level 3

The tank wagon keeps the train engine cooled. It begins as a vibrant blue and gradually turns red as it heats up. When it is completely red the train will then catch fire. To keep the tank wagon cool, players must fill the water bucket with water, and approach either the tank wagon itself or the train engine. In biomes without air, the water tank instead provides oxygen in a large radius.

The water tank has two upgrades. They both upgrade the capacity of the water tank making it so that it doesn't need to be cooled as often, as well as increasing the radius of oxygen around it.

Wagon Level	Capacity	Time	Space Radius	Bolt Cost
1	100%	30s	3	2
2	200%	60s	4.6	2
3	300%	90s	6.2	3
4 (Supercharged)	400%	120s	7.8	-
5 (2x Supercharged)	500%	150s	9.4	-