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Undersink Water Filter

Top Quality Replacement 5 Micron Carbon Filter

Easy to Change - You Get Everything You Need

Brand New, Unopened and in the Original Packaging

Friendly Support

Todays Price
£15.95INC VAT
In stock | Only 20 left at this price | Next Day Delivery
Free Delivery & Returns
Order before 3pm for same day dispatch today

"One of the most customer aware on line businesses around. Service is very efficient and when I have had the need for any assistance, they have been extremely thoughtful."


UK Water Filters Promise

If you change your mind about your purchase, for any reason, within 90 days, you can return your product for a full and complete refund. PLUS we will pay for your return postage (UK)

All orders shipped same day before 3pm

Free Delivery & Free Returns

(We’ll even pay your postage!)

3 Year full parts warranty

What you get
SKU: USC2000
Product Description

Under Sink Water Filter Cartridge Renewal

Our top quality "Master Purifier" Universal cartridge can be fitted to many other makes of water filters, including:

Cuno... Ametek ... Liff ... Plymouth ... Bruner ... Noga... Pentek... Homebase... Screwfix... and many Other Brands including reverse osmosis pre filters.

Water Filter Replacement

This top quality filter will replace any cartridge types that are 9 and three quarter inches length x 3 inches or less diameter. With a 1 inch aperture at either end.

If your existing filter looks anything like this it can probably be replaced by our specially made cartridge. See why below.

Why these Carbon filters can be Inter-changed

Will it Fit my Existing Water Filter?

Measure your filter

Micron size

Benefits of our Filter

Anti SCALE Option

Ordering Details

Why These Carbon Filters can be inter-changed

Firstly: in the bad old days water filters would come in all shapes and sizes. The aim was to force customers to return to particular manufacturers.

However in recent years there has been a growing move to standardise the sizes of filter cartridges. Now about 80% of all cartridges are the "universal ten inch size".

(Note: Why they are called "ten inch" is a mystery as they are actually 9 and three quarter inches high!)

Secondly: the great majority of water filters are made from carbon.

And the great majority of carbon filters basically consist of burnt coconut shell.

It is a question of exactly how it is moulded into the required filter shape during the filter manufacturing process.

For example, the carbon might be cut into grains and placed inside a hard cartridge case (Granular Activated Carbon / AC).

Or they might be compressed into Carbon Block and typically be surrounded by a mesh - as is the case with our specially made "10 inch" types - see above right.

While Carbon Block is now generally seen as being a superior method of filtration over GAC, they basically do the same job.

The point is that as long as the size of the cartridge is correct, one type can be changed for the other.

Micron Size of the Water Filters

The other thing to look for in any water filter is what micron size the cartridge filters down to.

A micron is a millionth of a meter, so 100 microns is a tenth of a millimetre.

A human hair is about 75 microns in diameter.

Our filter cartridge is a top quality carbon block cartridge that filters down to 5 microns.

Five micron cartridges are the standard size for good quality domestic water filters.

It is very likely that your existing cartridge is 5 microns - assuming it is not there to filter out something very specific

You can see what our 5 micron size filter removes - Click Here

The next size down from 5 is 1 micron. This is fairly unusual so if you know that your filter is 1 micron you would need to check if there is any specific reason for that.

It might be that it simply sounded good at the time to whoever bought the filter. Volume 11 must be better than volume 10, and all that...

But perhaps it is supposed to stop a specific contaminant like bacteria.

Now the best way to filter out bacteria is using filtration methods such as Reverse Osmosis or a combination of approaches – so 1 micron is not necessarily the best solution for that anyway.

The best way to determine if the standard 5 micron filter is right for you is to check on the following:

Do you have a private water supply? If you aren't on the normal mains / municipal supply then you might need special filtration – and even a 1 micron carbon cartridge might not be the best thing (Click here to see solutions to specific drinking water problems)

Do you have another special water supply situation / needs – for example you might have lead pipes… or a special health condition.
If so, unless you are looking to replace reverse osmosis 10 inch pre filters (if so, good: we can help you. our "ten inch" filters will do the job) – this might be a good time to review what the best water filter solution would be for you.

(Click here to see our water problem / solution chart)

Will it Fit my Existing Water Filter?

To check whether our standard cartridge is suitable for your water filter you need to check the size

Our standard filters measure as follows:

They are 9 and 3/4 inches (248mm) high

This height includes the rubber seals at both ends

They have a 1 inch hole at either end, in the middle, to slot into the housing unit.

Their diameter is approx 66mm. However they can replace cartridges with similar diameters.

The main thing is to make sure that the height is correct and they have a 1 inch hole at either end, in the middle, to slot into the housing unit.

Doesn't sound right?
Check out this solution
(Click here)


Sounds right? Then you can order your compatible replacement cartridge now.

Please note that your new filter will need replacing every 6 months or so. (We remind you when it's time).

If the measurements don't sound right we do have other types of filters. But we'd need to know more.

Is there any information on the make ... manufacturer?

What are the dimensions?

Try our Replacement Cartridge Matching Service


With FREE Delivery

Immediate Dispatch

Purchase with Total Confidence

Money Back Guarantee

If you don't like what you get send it back for a full no quibble refund.

If for any reason you decide to return your purchase we promise you a no questions asked THREE MONTH Money Back Guarantee Click here to read the "large print" about our Money Back Guarantee

PLUS We'll even pay your return postage !

Please order now to secure today's sale price.

Undersink Water Filter
Technical Information


9 and 3/4 inches (248mm) High

This height includes the rubber seals at both ends. They have a 1 inch hole at either end, in the middle, to slot into the housing unit. Their diameter is approx 66mm. However they can replace cartridges with similar diameters. The main thing is to make sure that the height is correct and they have a 1 inch hole at either end, in the middle, to slot into the housing unit.

See what our 5 micron size filter removes - Click Here

SKU: USC2000
Delivery & Returns

Free Second Class - up to 5 days (90% arrive in 3 days)

First Class - up to 2 days (95% next day delivery)

Free Returns and Money Back Guarantee. Full details

Free Lifetime Support

If you have any problems

... or concerns with your purchase we are here to help.

We are not "here today gone tomorrow" merchants.

A quick look at our Customer Feedback

... and our Money Back Guarantee should help reassure you that we are an honest firm who will give you a first class, long term service.

How to get help

Call our help line on 020 8761 6611 at any time during UK office hours ie 9 am to 6 pm

Or email us for a rapid response.

Our policy is always to get back to you within an hour - or one working day at most.


In addition to your 3 Year Warranty, if for any reason you change your mind about your purchase within 90 days of receiving the goods, you can return your product for a full and complete refund *

PLUS we will pay for your return postage (UK only)

*This applies to individuals/ consumers using the products in domestic settings. Businesses please see our terms and conditions

Delivery Times

Order before 3 pm on any working day and we guarantee your order will be sent out the same day (not on weekends)

(To be honest we often manage to send them even after 3pm. But we can't promise that).

All prices on the website include delivery charges and VAT except where stated otherwise.

Delivery Charges

Your Standard "Free Delivery Included" is Second Class

This usually takes between 3 to 5 working days ie does not count weekends or Bank Holidays

Pay Extra for First Class

You also have the option at checkout to pay extra for First Class.

This should result in next day working delivery to mainland UK.

BUT please note while 95% do arrive next day this is not guaranteed.

However arrival within two working days is almost certain.

You can see your delivery costs at the checkout stage before you buy.


Over 30,000+ happy customers

The great majority keep coming back for years because they like our friendly, helpful service and great value prices.

Free Delivery & Returns

All Orders Shipped Same Day Before 3pm

3 Year Full Parts Warranty