Grohe 40404001 Blue 5-Stage Replacement Water Filter 158.5 Gallon Capacity - - Amazon.com
Grohe 40404001 GROHE Blue BWT Replacement Filter | Build.com
GROHE Blue Filter - small - 600L - 40404001 | bol.com
Throw-away filter, For RedⓇ Mono/Duo, BlueⓇ and Blue PureⓇ | online at HÄFELE
Buy GROHE Blue S-Size Filter Starter Set (Filter Head, Filter Cartridge Capacity 600 L, Flow Meter Including 2 x AA Batteries), for Use with GROHE Blue Pure and GROHE Red Water Systems