Hyco Instantaneous Inline Water Heater

instantaneous
Operating or providing something instantly
(instantaneousness) immediacy: the quickness of action or occurrence; "the immediacy of their response"; "the instancy of modern communication"
Occurring, arising, or functioning without any delay; happening within an imperceptibly brief period of time
occurring with no delay; "relief was instantaneous"; "instant gratification"
Existing or measured at a particular instant
Occurring or done in an instant or instantly

water heater
a heater and storage tank to supply heated water
Water heating is a thermodynamic process using an energy source to heat water above its initial temperature. Typical domestic uses of hot water are for cooking, cleaning, bathing, and space heating. In industry, both hot water and water heated to steam have many uses.
An appliance for supplying hot water for purposes other than space heating or pool heating.

inline
(computing) To optimize using in-line expansion; Alternative spelling of in-line
A pump which operates in open air , by connecting tubing to the inlet and discharge outlet.
In the model car hobby, an inline car is a type of slot car or other motorized model car in which the motor shaft runs lengthwise down the chassis, perpendicular to the driven axle (usually the rear). Power is transmitted through a pinion to a crown gear on the axle, or through bevel gears.