bio tec under sink replacement water filter

Doulton® Biotect® Ultra (2501)

£29.45

Pack: One

One Two

Orders over £25 Ship Free!

14 day Returns

Made in Britain

SKU: W9123050-01

The Biotect® Ultra is Doulton’s hero water filter. Tested and certified by NSF to NSF/ANSI Standards 42, 53 & 401 (in our Kingfisher Biotect® Ultra Inline Water Filter System) and NSF/ANSI/CAN 372, it is designed to fit into all Doulton under sink water filter systems and our tap-mounted countertop filter systems and is compatible with the Kingfisher, Doulton DUO and Doulton TRIO systems.

Using natural materials, this ceramic water filter, with an activated carbon core, enhances your water quality by reducing a range of common contaminants whilst retaining healthy minerals - leading to smoother, cleaner, fresher water in every drop.

The Biotect® Ultra reduces up to 99.99% of common contaminants, including the following in varying levels which can be viewed on our performance claims table here:

Microplastics
Chlorine and monochloramine
Bacteria and cysts
Insecticides and herbicides
Heavy metals such as lead, cadmium and mercury

For full information on our testing data for the Biotect® Ultra and other filters in our range, please visit our test data page. You can also view comprehensive test results for this filter by clicking here.

If limescale is an issue in your water, the Biotect® Ultra SI filter may be a more fitting option, it offers the same protection against contaminants with additional limescale inhibition. The Biotect® Ultra SI filter is also compatible with all Doulton under sink and tap-mounted countertop systems.

You can also take our water quiz, to find out the best fit for your needs.

Compatible with

Doulton® HIP DUO Under Sink Water Filter System with Biotect® Ultra

Doulton® HIP TRIO Under Sink Water Filter System with Biotect® Ultra

Doulton® Countertop Water Filter System with Biotect® Ultra

Doulton® HIS Push-fit Under Sink Water Filter System with Biotect® Ultra

Not Compatible With

British Berkefeld® Stainless Steel Gravity System + Ultra Sterasyl Ceramic Filters

British Berkefeld® Stainless Steel Gravity System + Ultra Fluoride Ceramic Filters

British Berkefeld® 1 Litre Stainless Steel Gravity System & Ultra Sterasyl®

1 x Doulton Biotect Ultra (2501) Filter

Technical Documentation

Download instructions and test reports.

Product Instructions

Biotect Ultra 2501 Filter Product Instructions

How-To Video Gallery

Watch tutorials for setup and maintenance.

Doulton Biotect Ultra Ceramic Filter

Free shipping is available on orders over £25/€25.

Next working day delivery is available for orders placed by 11:00 (Monday to Friday), subject to the destination and courier availability. Orders placed after this time will be processed on the next working day.

Additional details and options specific to your country will be provided at checkout.

Discover more in our FAQ

How often should I replace the filter in my Doulton filter system?

We recommend replacing your filter every 6 months. If you notice a drop in water pressure or a change in taste, it may be time to replace the filter. You can try cleaning the filter first, following our guidelines if you notice any changes earlier than 6 months. How to clean a ceramic water filter (Youtube)

What systems is the Biotect Ultra Filter compatible with?

The Doulton Biotect Ultra filter is compatible with all Doulton under sink and tap-mounted countertop systems. They are designed for use with any system that has an M12 fitting. If you would like to use a Doulton filter in any other brand of system, please check with the manufacturer directly for compatibility.

Can I set up a subscribe and save service for Doulton filters?

Of course! Please head to our subscribe and save page to sign up and enjoy automatic replenishment of your filters, alongside an exclusive discount.

Doulton® Biotect® Ultra (2501)