Under-Sink Water Filter Installation Costs in Ireland (2026)
Clean, safe drinking water is a must for every household. An under-sink water filtration system is one of the most effective ways to ensure your tap water is free from unwanted taste, odour, and contaminants. If you're considering having an under-sink water filter installed, it's important to understand the costs involved—everything from the system itself to installation and ongoing maintenance.
In Ireland, the total cost to supply and install an under-sink water filter system in 2026 typically ranges from €150 for a basic setup to over €550 for advanced reverse osmosis models. Entry-level models like the NW26 can be found for just under €70 (excluding installation), while fully installed mid-range systems, such as the Cleanwater Original, cost around €395 all in. High-end, fully pumped reverse osmosis systems can reach €460 or more, not including extra charges if your kitchen needs modifications.
It's wise to factor in the additional expenses that may arise during installation (especially if you're dealing with tricky countertop materials), and don't forget the ongoing cost of replacement filters—€100 or more per year is not unusual. This guide breaks down these elements clearly, helping you make an informed decision and avoid surprises.
Typical Costs for Under-Sink Water Filter Systems and Installation (Ireland, 2026)
| Job | Typical price (incl. VAT) |
|---|---|
| Basic system (kit only)E.g., NW26 Undersink Water Filter System | €70–€110 |
| Mid-range system (supply and install)E.g., Cleanwater Original Drinking Water System | €350–€420 |
| Advanced reverse osmosis system (kit only)Bit extra for installation | €350–€460 |
| Professional installation (basic/standard system)Depends on access and region | €80–€150 |
| Countertop drilling (granite/tiled, per hole)Additional to base install | €35 |
| Annual filter replacementsE.g., Cleanwater Combi filter set €105 | €60–€120 |
| Reverse osmosis system (supply & install, typical) | €400–€600 |
Prices are typical 2026 estimates and vary by job, condition and location.
What Affects the Total Cost?
The price you pay for an under-sink water filter system in Ireland isn't limited to just the upfront cost of the kit. Several factors come into play, so it's worth understanding them to budget wisely.
- System type: Basic carbon filters are cheaper; reverse osmosis units command higher prices due to complex filtration.
- Installation difficulty: More time and cost if your plumbing needs modification or if special countertop drilling is required.
- Location: Labour rates in Dublin and some urban areas are higher than elsewhere.
- Filter replacement: Ongoing costs that vary between models.
- VAT: Standard 23% applies—always check if quotes are VAT-inclusive.
Breakdown: Types of Under-Sink Water Filters
Under-sink water filters come in a few main types, each with its own benefits and price range.
- Activated carbon/ceramic filters: Good for taste, odour, and most sediment. Affordable and straightforward to install.
- Combi/multi-stage filters: Offer broader filtration (including some chemical and bacterial contaminants) at a moderate price.
- Reverse osmosis (RO): Top-tier, removing a broader range of impurities, but needs more space and is pricier—both to buy and maintain.
Installation: What’s Involved and What Might Add to the Price?
Getting your under-sink filter fitted by a professional is a smart move—ensuring safety, compliance and warranty protection. Basic installations are usually straightforward, but some kitchens pose extra challenges.
- Simple swap-ins for standard sinks and plumbing are cheapest.
- Granite/tiled countertops may need diamond drilling—expect an extra €35 per hole.
- Complicated plumbing layouts could push the price up.
- Check whether the quoted price covers all parts, labour, and VAT.
Maintenance and Running Costs
Remember, a water filter isn’t a fit-and-forget device. Regular upkeep is essential. Most filters need replacing every 6–12 months, depending on water quality and system type.
For example, a set of replacement filters for a combi system may cost around €100 per year. Reverse osmosis systems can also incur extra maintenance due to their complexity. Factor this into your decision—cheaper systems with expensive filters may not save you money in the long run.
Tips for Getting Best Value
- Test your tap water to pick the right filter (some regions need just taste/odour removal, others require stronger filtration).
- Always compare at least three detailed quotes from reputable local fitters.
- Confirm if VAT and all installation extras are included.
- Choose systems with affordable and available replacement filters.
- Stick to certified professionals for compliance and safety.
Frequently asked questions
Are under-sink water filters covered by SEAI grants in Ireland?+
No. As of 2026, SEAI home energy grants do not cover under-sink water filter systems. You'll need to fund the purchase and installation yourself.
Is professional installation necessary for under-sink water filters?+
While some basic kits are DIY-friendly, professional installation is strongly recommended. It ensures compliance with plumbing regulations and avoids leaks or damage—especially with complex or reverse osmosis units.
How often should I replace my under-sink filter cartridges?+
Most manufacturers recommend changing filters every 6–12 months. Exact timing depends on your water quality, filter type, and household usage. Skipping replacements risks poor performance and water quality.
Can installation be more expensive in Dublin?+
Yes. Labour and demand tend to be higher in Dublin, so installation costs are often above those in other parts of Ireland. Always get several quotes to compare.
Do the quoted prices normally include VAT and all extras?+
Not always—some advertised prices exclude VAT or special extras like countertop drilling. Ask upfront for a full breakdown to avoid unexpected charges.
What should I check before choosing a water filter system?+
Test your water for specific contaminants, compare filter maintenance costs, and make sure you're buying from a reputable supplier who offers certified installation.
Ready to get real quotes?
Tell us about your plumbing & heating job and compare free quotes from verified local pros.