descaler

As a noun descaler

is that which descales (removes scale from a surface).

As a verb descaled is

(descale).

As a verb descales

is (descale).

As a noun descaler is

that which descales (removes scale from a surface).

As a verb descale

is to remove scale from the surface of a metal, especially from the inner surfaces of boilers etc.

As a noun descaler is

that which descales (removes scale from a surface).