Doulton Ultracarb Countertop Water Filter Replacement Cartridge W9123006

Genuine Doulton Ultracarb replacement cartridge (model W9123006) for compatible Doulton and third-party countertop water filter systems. The Ultracarb is Doulton's premium three-stage ceramic candle filter — combining a Sterasyl ceramic outer shell, a silver-impregnated activated carbon core, and an ion exchange mesh — in a single, self-contained unit.

Doulton ceramic candle filters are manufactured in the United Kingdom and have been in continuous production since the 1800s. The Ultracarb range is Doulton's most capable candle-style cartridge, designed to address bacteria, cysts, chlorine, taste and odour, and lead in a single-stage replacement.

Available in 1x, 2x, 3x, 4x, and 5x packs — select your preferred pack size from the dropdown menu above.

Three-Stage Filtration in One Cartridge

The Doulton Ultracarb W9123006 combines three distinct filtration stages:

1. Sterasyl ceramic outer shell (0.9 micron absolute) — designed to help reduce bacteria and cysts including giardia and cryptosporidium by physical size exclusion. The Sterasyl ceramic contains silver to inhibit bacterial growth within the cartridge. [NEEDS VERIFICATION: confirm 0.9 micron absolute rating and independent test data for this specific model before publishing bacteria/cyst reduction claims.]
2. Silver-impregnated activated carbon core — designed to help reduce chlorine, volatile organic compounds (VOCs), and unpleasant taste and odour.
3. Ion exchange media — designed to help reduce lead and other heavy metals from the filtered water. [NEEDS VERIFICATION: confirm lead reduction percentage and specific metals addressed with supplier documentation.]

Filter performance depends on source water quality, flow rate, filter age, and maintenance. Verify all performance claims with Doulton Australia or the supplier before publishing specific reduction percentages.

Compatible Filter Systems

The W9123006 candle is designed for use in countertop water filter housings that accept a standard Doulton candle with the W9123006 head fitting. Compatible systems typically include:

• Doulton Countertop and Benchtop filter housings
• British Berkefeld countertop systems
• Third-party countertop filter housings that accept a Doulton candle head

Before ordering: Confirm that your existing housing accepts the W9123006 head fitting. If you are unsure, contact our team with your housing model number before purchasing.

Specifications

When to Replace

Replace the Ultracarb candle approximately every 6 months or 2,000 litres — whichever comes first. The carbon stage has a shorter lifespan than the ceramic alone. Signs that your candle needs replacing earlier include:

• Reduced flow rate through the filter that cannot be restored by brushing the ceramic surface
• Return of chlorine taste or odour to the filtered water
• Change in filtered water clarity or taste

Unlike the plain Sterasyl candle, the Ultracarb's activated carbon core cannot be reactivated by flushing — the candle must be fully replaced when the carbon is spent.

Cleaning and Maintenance

1. The outer ceramic surface can be periodically cleaned with a soft brush under cold running water. This removes surface fouling and helps restore flow rate.
2. Do not use cleaning agents, detergents, or hot water on the ceramic candle — this may damage the filtration media or remove the silver impregnation.
3. After cleaning, flush 2–3 litres of water to waste before continuing to use for drinking.
4. Replace the candle fully every 6 months or 2,000 litres regardless of appearance.

Shipping Information

Available for delivery Australia-wide. Ceramic candle filters are fragile — this product is packaged with protective materials to reduce the risk of transit damage. If your item arrives damaged, please photograph the damage and contact our team immediately.

Remote area delivery surcharges may apply at checkout.

Warranty and Returns

Covered by Australian Consumer Law guarantees. [NEEDS VERIFICATION: confirm any manufacturer's warranty offered by Doulton for this cartridge.] For enquiries, visit our Contact page.

Frequently Asked Questions

Which filter systems is the W9123006 compatible with?

The W9123006 is compatible with Doulton-brand countertop filter housings and other third-party housings designed to accept a Doulton candle with a W9123006 head fitting. If you're unsure whether this fits your system, contact us with your housing model before purchasing.

How long does the Ultracarb last?

Approximately 6 months or 2,000 litres — whichever comes first. The carbon stage typically limits the lifespan before the ceramic shell is worn out. Households with larger filtration needs (high daily usage or poor source water quality) may need to replace sooner.

Can I clean the Ultracarb to extend its life?

You can gently brush the outer ceramic surface under cold water to restore flow rate — but this only addresses surface fouling on the ceramic shell. Once the activated carbon core is exhausted, cleaning the ceramic does not restore chemical filtration performance. The candle must be fully replaced every 6 months regardless.

Does the Ultracarb remove fluoride?

No — the Doulton Ultracarb W9123006 is not designed for fluoride reduction. If fluoride reduction is a priority, consider the 97% Fluoride Reduction Ceramic Dome or the 8 Stage Fluoride Reduction Filter Cartridge for gravity-fed Awesome Water purifiers.

Is this a genuine Doulton product?

Yes — this is the genuine Doulton Ultracarb cartridge, model W9123006, manufactured by Doulton in the United Kingdom. [NEEDS VERIFICATION: confirm authorised reseller status with Doulton Australia before publishing this claim.]

What is the difference between the Ultracarb and the plain Sterasyl candle?

The plain Sterasyl is a single-stage ceramic filter — it addresses bacteria, cysts, and sediment. The Ultracarb adds an activated carbon core (for chlorine, VOCs, taste and odour) and an ion exchange layer (for lead reduction). The Ultracarb is more capable but has a shorter service life due to the carbon stage.

Also Consider

• All Countertop Water Filter Cartridges
• All Replacement Filter Cartridges
• Benchtop Water Filters — systems compatible with replacement cartridges