descale

/ ˌdiːˈskeɪl /

verb

1. to remove the hard deposit formed by chemicals in water from (a kettle, pipe, etc)

Example Sentences

First, have your fishmonger clean it, descale it and trim the sharp fins.

From Washington Post

Do a Web search for “descale pipes with vinegar” to read up on the basic process.

From Washington Post

Wondering how often to descale a Keurig?

From Salon

Fishmongers at Harris Teeter, Whole Foods and other stores will debone, descale and fillet fish.

From Washington Post

A $5,000 ticket to the TED conference – for the relative you hate the most, surely – and a lover’s gift guide in which every single item reads like the setup to a Victoria Wood joke about having to descale the kettle first.

From The Guardian