header tank

noun

noun

A reservoir or tank that maintains a gravity feed or a static fluid pressure; a raised tank of water maintaining pressure in a plumbing system.

The header tank for the cooling water, the engine air inlet and filter, fire extinguisher and tool and medical cupboard are located in one luggage compartment, through which the exhaust pipe also passes.1958 July 23, “German Railbuses for British Railways”, in Railway Magazine, page 501:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.