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Join over 30,000 delighted customers

Undersink Water Filter Ceramic 0.5 Micron Cartridge

Undersink Water Filter Ceramic 0.5 Micron Cartridge

More about your Undersink Water Filter Ceramic 0.5 Micron Cartridge

A High Quality, Fully-Tested Product

Brand New. Straight From The Factory

Full Fitting Instructions Provided

Easy Installation - Friendly Support

Only 194 in stock at this price | Available for next day delivery
Unavailable
guaranteed-fit
UK Water Filters Promise

If you change your mind about your purchase, you can return it for free, within 90 days, for a full refund.

Free Delivery & Returns
Order before 3pm for same day dispatch today
"Absolutely outstanding service. These folks really do know how to do an amazing job. I honestly am so delighted with everything they have done. The kit is superb, water tastes wonderful. They always send the filters quickly and have answered many questions I had when fitting the system and the replacement filters. I highly recommend them. Such lovely staff, always so helpful and easy to contact when you need advice. So very glad I went with them and so grateful to them for such a high quality service. 🤩 great work 🤩"
Kelly - June 2025

Need help finding the right filter?

Let us help pick the best filter for your needs, ring us on 020 8761 6611 or email us. Alternatively, have you tried our quiz? You will find the right filter in under 30 seconds.
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Product Description

Renew My Doulton Ceramic 0.5 Micron Cartridge

Doulton Imperial Sterasyl Ceramic Filter

Renew my Doulton Ceramic 0.5 Micron Cartridge for my under sink Water Filter System

Performance Chart:

Absolute Filtration > 99.99%
Filtration efficiency for particles between 0.5 and 0.8 micron > 99.98%
Reduces Cysts including live Cryptosporidium > 99.999%
Reduces Turbidity > 98%
Reduces Chlorine taste and odour @ 2ppm > 97.5%
Flow Rate > 3.75 LPM
Capacity (Litres) > 7500
E-Coli, Klebsiella, Terrigena, Vibro Cholera > 99.99%
Salmonella Typhi, Shigella > 99.999%

This filter should be changed every SIX months


ORDER ANYTIME Day or Night 24/7 for NEXT DAY DELIVERY

With FREE Delivery

Immediate Dispatch

Purchase with Total Confidence

Money Back Guarantee

Click here for delivery information

No hidden extras

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.

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Product Code: CER-USC

Doulton Ceramic 1 Micron Cartridge
Technical Information

Cartridge Dimensions

9 and 3/4 inches (248mm) High

2 and 1/2 inches (66mm) Wide

Product Weight: -0.95 lbs.


This filter should be changed every SIX months

This filter can replace the following:

Doulton W9222910 / W9222903

Doulton W9220406 Imperial Sterasyl OBE Ceramic Filter


Plus replaces / is compatible with

General Ecology Seagull 789000 RS-2SG

General Ecology Seagull X-2K

Seagull IV X-2K / RS-2SG

Neo-Pure NP-2SG Seagull Compatible

You'll also need to buy a new housing unit for £27 - on your first purchase only. Please see /products/new-housing-unit-without-cartridge

Measure the outside diameter of your current in / out tubing. Let us know the size and we will send you the housing with the correct port size.


Product CODE CER-USC I CER USC I CERUSC



ORDER ANYTIME Day or Night 24/7 for NEXT DAY DELIVERY

With FREE Delivery

Immediate Dispatch

Purchase with Total Confidence

Money Back Guarantee

Click here for delivery information

No hidden extras

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.

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SKU: CER-USC
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.

Returns

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.

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Over 8,000 reasons to buy from us

Well Established

We are a family run business who value our customers. We've been trading for over twenty five years. So we won't be "here today gone tomorrow". Your Money Back Guarantees and Warranties will be safe.

Fully Accredited

Members of Safebuy the leading Consumer Assurance Scheme for online retailers approved under the Trading Standards Institute's Consumer Codes Approval Scheme.

Repeat Customers

Many of our clients have been buying filters from us for several years. Over 95% keep coming back to renew their filter because we offer a friendly, helpful service and great value prices. Checkout our TrustPilot reviews.

We’re Trustworthy

We have a huge number of great independent testimonials. For example on the Approved Consumer Code Directory for the Trading Standards Institute and on Google Certified Shops.