A INDICATOR AND RUST REMOVER SYSTEM USING THE SAME

摘要

The present invention provides an indicator and a rust removing system using the same, installing a sheet of which color is changed in accordance with contaminated fluid introduced from a water pipe and capable of verifying a contaminant degree of a pipe with the naked eye through a display unit to cover a body unit. Specifically, according to the present invention, a sheet having a different size of an opening can be changed for filtering to be possible in accordance with a size of a rust particle.