back boiler

noun

1. a tank or series of pipes at the back of a fireplace for heating water US namewater back

Example Sentences

"I have a coal fire and that provides heat from the back boiler, and I don't use electricity if I can help it to heat rooms."

From BBC

Lifted steamer from water, broke her back, boiler exploded, and that was the end of 'Lavinia.'

From Project Gutenberg

The hot plate is over all, and there is a back boiler, made of wrought iron, with brass tap and steam-pipe.

From Project Gutenberg