filtered water
Water that has been passed through a filter; used in contexts like water treatment, aquariums, or laboratory settings.
This device purifies filtered water into drinking water.
Refers to the removal of water, often in civil engineering or agricultural contexts; less common than 排水.
After the heavy rain, the drainage system didn't work.
water filter
filter bed; filtration tank
Standard kanji spelling for 'filtered water' and 'drainage'.
Mixed kana-kanji spelling; 濾 is a non-jōyō kanji, so this form is sometimes used for readability.
Compound of 濾 (filter) and 水 (water). The kanji 濾 is not in the jōyō list, so the mixed form ろ水 is sometimes used.