Translation guide
A device or material that removes impurities from water. In Japanese, the most common term is 浄水器 (jōsuiki) for household water purifiers, while フィルター (firutā) is used for replaceable filter cartridges. For industrial or large-scale filtration, ろ過装置 (roka sōchi) is used.
A device attached to a faucet or installed under the sink to purify tap water for drinking.
The standard term for a household water purifier. Often used for countertop or faucet-mounted types.
I bought a new water filter.
This water filter has easy cartridge replacement.
A water filter pitcher, like a Brita. Used for pour-through filtration.
I filter water with a water filter pitcher.
The replaceable part inside a water purifier that actually filters the water.
Equipment for filtering water in factories, pools, or water treatment plants.
A small filter used for camping, hiking, or emergencies to make water safe to drink.
浄水器 refers to the whole water purification device, while フィルター usually means the replaceable filter inside. In casual speech, フィルター can sometimes mean the whole device, but it's clearer to use 浄水器 for the appliance.
I replaced the filter of the water purifier.
This filter lasts three months.
Specifically the cartridge unit. Often used in product manuals.
Please replace the water filter cartridge with a new one.
The pool's water filter broke down.
With a filter water bottle, you can drink safe water anywhere.