ろ材ざい

noun

filter medium; filter material

Technical term for the material used in a filter, such as activated carbon, sand, or fabric.

• この浄じょう水すい器きのろ材ざいは半はん年としごとに交こう換かんが必ひつ要ようです。

  The filter medium in this water purifier needs to be replaced every six months.