How often do you replace the filter in a boiling water tap?

It depends on the model. In our data 13 models list a replacement every 6 months and 8 list every 12 months. 6 of the 27 models with a filter have no interval in our data, so check the manufacturer's instructions for those.

Does a Quooker have a filter you replace?

In our data all 6 Quooker taps list the same filter: "Active carbon filter inside the tank". We have no replacement interval for it, and Quooker is not sold on Amazon UK, so this page has no filter link for it. Ask Quooker or your installer about replacement.

What does the filter type in the table mean?

It is the description of the filter as the manufacturer gives it, copied into our model data. Carbon filters are described as carbon or carbon block, some taps add a second stage or a resin, and some brands name the cartridge itself. Different names do not always mean different filters, so compare the wording on the model page.

Where can I buy a replacement filter?

Where we have confirmed the exact cartridge, the table links to it on Amazon UK. For every other model we show no link, because we do not guess at a cartridge number. The manufacturer's site or your installer is the reliable source for those.

Filter guide

Boiling water tap filters: replacement intervals for 27 models (2026)

27 of the boiling water taps in our library have a filter. Of those, 13 list a replacement every 6 months and 8 every 12 months, and 6 give no interval in our data. The table below groups every model by brand with the filter as the manufacturer describes it.

Why a boiling water tap has a filter

The filter takes something out of the mains water before it reaches the tank or the tap. How much it removes depends on the filter, and we do not publish removal figures because the manufacturers' own claims are not comparable. What our data does hold is the filter description and, for most models, how often the cartridge is due for replacement. That interval matters when you compare the cost of owning a tap over several years.

What the filter type tells you

The filter type column is copied from the manufacturer. The common wording is carbon or carbon block. Some brands describe the cartridge by what it protects: the Franke Instante is listed with a filter described as boiler limescale protection. Several taps use a two-stage or five-stage cartridge, and the Franke water hubs add an ion-exchange resin.

Every 6 months or every 12

The 13 models on a 6 month interval come from Abode, Arnotap, Fohen, Franke, Hanstrom and Qettle. The 8 models on 12 months come from Franke, Grohe and Zip Water. A longer interval means fewer cartridges to buy, but cartridge size, price and flow rate differ, so compare the whole cartridge before you decide.

For 6 models we have no interval: Quooker Classic Fusion, Quooker Flex, Quooker Front, Quooker Fusion Round, Quooker Nordic Round Single Tap and Quooker Nordic Square Twintaps. Check the manufacturer's instructions before you assume a date.

To see what a tap costs to run on top of the filter, use the running cost calculator. Quooker owners can start from the Quooker brand page, and Franke owners from the Franke brand page.

Filter and replacement interval for 27 models

If you buy through a replacement filter link we may earn a commission. It never changes how we rank or score a tap. How affiliate links work here

A link appears only where the filter in our data matches a cartridge we have confirmed. Everywhere else we show none rather than guess a cartridge number.

Abode

Model	Filter	Replace every	Replacement
Abode Pronteau Province 4-in-1	5-micron carbon block	6 months	-

Arnotap

Model	Filter	Replace every	Replacement
Arno Square 4-in-1	2-stage filter: PP cotton + activated carbon block	6 months	-

Fohen

Model	Filter	Replace every	Replacement
Fohen Focetti Pro 4-in-1	carbon and calcium	6 months	-
Fohen Kyros 4-in-1 Pull Out	carbon	6 months	-
Fohen Modena Digital 100	carbon and phosphate	6 months	-

Franke

Model	Filter	Replace every	Replacement
Franke Instante	Franke 08 cartridge: carbon core, sold as boiler limescale protection	6 months	-
Franke Maris Water Hub 3-in-1 Electronic	Franke Pro M: five-stage, with ion-exchange resin and a 5 micron carbon block	12 months	-
Franke Maris Water Hub 3-in-1 Mechanical	Franke Pro M: five-stage, with ion-exchange resin and a 5 micron carbon block	12 months	-
Franke Mythos Water Hub 5-in-1	Pro M Connect: active carbon + ion-exchange resin	12 months	-
Franke Mythos Water Hub 6-in-1	Pro M Connect: active carbon + ion-exchange resin	12 months	-
Franke Omnidiscontinued	Franke 08 filter cartridge	6 months	Franke 08 filter cartridge at Amazon ↗

Grohe

Model	Filter	Replace every	Replacement
Grohe Red Duo L-Size	BWT active carbon	12 months	-

Hanstrom

Model	Filter	Replace every	Replacement
Hanstrom Saxan 4-in-1	carbon and phosphate	6 months	-
Hanstrom Ume 3-in-1	Hanstrom Carbon Pure water filter	6 months	-

Qettle

Model	Filter	Replace every	Replacement
Qettle Original 4-in-1	Q08 extruded carbon block cartridge	6 months	-
Qettle Signature	Q08 extruded carbon block cartridge	6 months	-
Qettle Signature Modern 4-in-1 (4L)	Q08 extruded carbon block cartridge	6 months	-
Qettle Signature Modern 4-in-1 (Round Spout, 7L)	Q08 extruded carbon block cartridge	6 months	-

Quooker

Model	Filter	Replace every	Replacement
Quooker Classic Fusion	Active carbon filter inside the tank	Not stated	-
Quooker Flex	Active carbon filter inside the tank	Not stated	-
Quooker Front	Active carbon filter inside the tank	Not stated	-
Quooker Fusion Round	Active carbon filter inside the tank	Not stated	-
Quooker Nordic Round Single Tap	Active carbon filter inside the tank	Not stated	-
Quooker Nordic Square Twintaps	Active carbon filter inside the tank	Not stated	-

Zip Water

Model	Filter	Replace every	Replacement
Zip HydroTap Classicdiscontinued	Zip GlobalPlus 0.2 micron filter	12 months	-
Zip HydroTap G5 Celsius Arc (3-in-1)	Zip MicroPurity 0.2 micron filter	12 months	-
Zip HydroTap G5 Cube Plus	Zip MicroPurity 0.2 micron filter	12 months	-

Questions people ask

How often do you replace the filter in a boiling water tap?: It depends on the model. In our data 13 models list a replacement every 6 months and 8 list every 12 months. 6 of the 27 models with a filter have no interval in our data, so check the manufacturer's instructions for those.
Does a Quooker have a filter you replace?: In our data all 6 Quooker taps list the same filter: "Active carbon filter inside the tank". We have no replacement interval for it, and Quooker is not sold on Amazon UK, so this page has no filter link for it. Ask Quooker or your installer about replacement.
What does the filter type in the table mean?: It is the description of the filter as the manufacturer gives it, copied into our model data. Carbon filters are described as carbon or carbon block, some taps add a second stage or a resin, and some brands name the cartridge itself. Different names do not always mean different filters, so compare the wording on the model page.
Where can I buy a replacement filter?: Where we have confirmed the exact cartridge, the table links to it on Amazon UK. For every other model we show no link, because we do not guess at a cartridge number. The manufacturer's site or your installer is the reliable source for those.