Replacement Water Filter Cartridge for Boiling Taps | Carbon Refill

Replacement Water Filter Cartridge for Boiling Taps – Carbon Rod Refill, 3 to 6 Month Cycle

This is the part you change, not the part you fit. A replacement water filter cartridge for the inline filter on ELLSI 3 in 1 and 4 in 1 boiling water taps: the carbon rod element on its own, ready to twist into the filter head already mounted in your cupboard. No housing, no bracket, no tubing — just the refill, which is all most owners need two to four times a year.

Inside is an activated carbon rod. Going by its printed label, it adsorbs organic chemicals, odour, dirt and fine particles, and removes calcium and magnesium — the hardness minerals that would otherwise bond to the heating element in the tank as scale. That second job is why the cartridge has a schedule. Once it is spent nothing fails on the day; the tank simply starts scaling again, and the tea starts tasting of the mains.

Before ordering, look at the top of the cartridge you are replacing. This one has a screw-fit neck with two black O-rings, shown in the close-up photo. Older ELLSI systems were supplied with a different filter top, and this cartridge will not suit those heads. If yours does not match, order the inline water filter kit instead: it replaces the head as well, and from then on this cartridge is the only part you buy.

It goes on the cold feed only. The label rates it for water between 4°C and 38°C at up to 0.4 MPa (4 bar), with a flow of 3.5 litres a minute, and it must sit upright in its head. If your mains pressure runs above 4 bar, the label calls for a pressure reducing valve ahead of the filter inlet.

Features & Benefits

• Replacement water filter cartridge only — the refill for an existing inline filter head, without paying for a second housing and bracket.
• Activated carbon rod element for organic chemicals, odour, dirt and fine particles.
• Calcium and magnesium removal so scale cannot build up on the tank's heating element.
• Screw-fit neck with a double O-ring seal — the old cartridge twists out of the head and the new one twists in by hand.
• Fits ELLSI 3 in 1 and 4 in 1 boiling water taps, including the same system sold under other badges (see the specification).
• 3–6 month replacement cycle, set by your water hardness and how much you draw.
• Protects the tap's warranty — the label warns that not changing the filter as instructed may invalidate it.
• 2 year guarantee against manufacturing defects.

Product Specification

What's Included

• 1 x Activated carbon rod replacement filter cartridge

The filter head, wall bracket, connectors and tubing are not included — they come with the inline water filter kit.

When to Change It, and How

Where you land in the 3–6 month window depends on your water. Supplies across Dublin, Kildare, Meath and much of the midlands are hard, so plan on every three or four months there; softer water in the west stretches it towards six. Two signs it is due: water from the boiling side starts to taste of the mains again, and its flow slows a little. A note in the calendar works better than waiting for either.

The change itself takes a few minutes and no tools. Turn off the cold supply to the tank, twist the old cartridge anticlockwise out of the head, check the O-rings on the new one are seated, and twist it in until firm, keeping it upright. Turn the supply back on and let water flow through the new cartridge for about 30 seconds to prime it before normal use.

Why Choose a Replacement Cartridge Over the Full Kit?

Because the head does not wear out — only the element inside it does. If your filter head is mounted, sealing properly and takes the top shown here, the cartridge is all you need, and it is the cheaper way to keep the tank protected year after year. Choose the full kit instead if the head is cracked or discoloured, if your system was fitted without a filter, or if your current cartridge has the older top.

This is the refill for the filter supplied with our chrome, matt black and brushed brass 3 in 1 boiling taps — the same cartridge for all three, because it lives in the cupboard rather than on the sink. Keeping one spare under the sink means the change happens on schedule rather than when the tea tastes off. Not sure it suits your tap? Send us the code on your current filter or tank and we will confirm before you order.

We ship across Ireland — Dublin, Cork, Galway, Limerick, Waterford and everywhere between — with free delivery on orders over €100 and same-day Dublin collection on stocked items by arrangement. See all boiling water taps or browse our kitchen accessories.