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.
water filter (household device)
water filter (replaceable cartridge)
A device attached to a faucet or installed under the sink to purify tap water for drinking.
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 water filter has easy cartridge replacement.
I filter water with a water filter pitcher.
I need to replace the water filter.
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 factory uses a water filter to clean the water.
A simpler term for a filter device, can be used for smaller industrial units.
The pool's water filter broke down.
I take a portable water filter when mountain climbing.
A water bottle with a built-in filter, like LifeStraw bottles.
With a filter water bottle, you can drink safe water anywhere.