BRITA make good quality water filters. In-line water filters are usually easily inter-changeable. The one we supply is not the original Brita but a specially made generic replacement.
Filter Cartridges – Refill Cartridges
OnePurify RFC1000A Water Filter Replacement Cartridge for sale online
Brita Classic Cartridges 3 Pack
Brita on tap water filter - Find the best price at PriceSpy
BRITA P1000 replacement filter cartridge for BRITA filter taps, reduces chlorine, limescale and impurities
Brita P1000 Kitchen Tap Replacement Cartridge - Screwfix
Water filter systems for your tap
How to Install or Replace your BRITA A1000 filter