Pure Water OnTap

Water you love has never been easier.

Get OnTap

Lifetime Warranty

EU Court Rules Against Ireland Over THM-Laced Water

RTE reports multiple Irish water supplies exceed safe limits for trihalomethanes (THMs)—byproducts of water chlorination that pose health risks.

Reported by RTE
EPA: 450,000 on At-Risk Water

According to the EPA and Irish Times, nearly half a million people depend on supplies with sustained problems of hazardous THMs and parasite cryptosporidium.

Reported by Irish Times
52 Cases of Pesticides in Irish Drinking Water

RTE reports that Uisce Éireann detected over 50 cases of pesticides that exceeded allowable amounts in drinking water.

Reported by RTE

EU Court Rules Against Ireland Over THM-Laced Water

RTE reports multiple Irish water supplies exceed safe limits for trihalomethanes (THMs)—byproducts of water chlorination that pose health risks.

Reported by RTE
EPA: 450,000 on At-Risk Water

According to the EPA and Irish Times, nearly half a million people depend on supplies with sustained problems of hazardous THMs and parasite cryptosporidium.

Reported by Irish Times
52 Cases of Pesticides in Irish Drinking Water

RTE reports that Uisce Éireann detected over 50 cases of pesticides that exceeded allowable amounts in drinking water.

Reported by RTE

Purest taste

OnTap reduces chlorine, odours, and off-flavours, giving you water that tastes as pure as it looks.

Purest taste

OnTap uses activated carbon filtration to reduce chlorine, trihalomethanes, and other volatile compounds commonly found in Irish tap water. This improves taste, removes odours, and enhances clarity—delivering water that's clean, fresh, and pure both in flavour and appearance.

The taste of our water has improved and I can now drink it instead of bottled water. Happy purchase 👍

- Robert Martin

Advanced filtration

Reduce THMs, microplastics, and other unwanted contaminants—feel confident about what you're drinking.

Advanced filtration

Our multi-stage system strip out trihalomethanes, traps microplastics down to sub-micron size, and lock away a spectrum of chemical and particulate impurities. The result is water that looks crystal-clear, smells neutral, and tastes naturally refreshing—so every glass delivers pure peace of mind.

I tested the water before and after installing the filter… Glad it works… Even from taste alone I can tell the difference.

- Piotr Menchly

Convenient hydration

Install in minutes, switch between filtered and unfiltered with a flick, and enjoy refreshing, contaminant free water.

Convenient hydration

Installation takes just minutes—no tools or specialist help needed. Once in place, a simple switch lets you move between unfiltered and filtered water, making it easy to get clean, reliable water straight from your tap whenever you need it.

We needed a water filter but didn't want to pay for a large system and installer. Water tastes great and is was super easy to install. Simply twisted it on with the provided fitting.

- Alex Brutska

Cost saving

Cut down on single-use plastic and reduce your carbon footprint—all while reducing your grocery bill.

Cost saving

Avoid the €0.15–€0.25 deposit added to every bottled-water purchase in Ireland—filtering at the tap costs only pennies per litre and keeps plastic out of your shopping basket.

The taste of our water has improved and I can now drink it instead of bottled water. Happy purchase 👍

- Robert Martin

4.9 | 328 reviews

OnTap gives you the best tasting water, guaranteed. Simple to install, start drinking filtered water from your tap in just 10 minutes.

Claim Welcome Offer - Only €54.99

4.9 | 328 reviews

Stainless Steel

Easy to Install

Faucet Fit Guarantee

OnTap gives you the best tasting water, guaranteed. Simple to install, start drinking filtered water from your tap in just 10 minutes.

OnTap Housing

Lifetime Warranty*

€54.99

€67.99

3 Month Filter Supply

Micron+ Filter Included

Free

€27.99

Free Delivery*

All New Customers

Free

€7.00

Total

€54.99

€102.98

Buy Now

1) Remove Aerator*

2) Twist OnTap in Place

3) Add Filter

4) Enjoy Filtered Water

What does it filter?

THMs

via Activated Carbon

Activated carbon adsorbs disinfection byproducts, improving safety.

Testimonials

What our customers say

Saoirse Delaney

Verified Buyer

Love getting new filters!

The filter is very convenient but even more convenient is the filter subscription!!! I don't need to remember to change the filter, or search for the right one in the shop... when the time comes, it just arrrives!! Brilliant service

Robert Martin

Verified Buyer

Fresh Taste

The taste of our water has improved and I can now drink it instead of bottled water. Happy purchase 👍

Alex Brutska

Verified Buyer

Super easy to install

We needed a water filter but didn't want to pay for a large system and installer. Water tastes great and is was super easy to install. Simply twisted it on with the provided fitting.

Sara Costello

Verified Buyer

Easy installation great taste!

I was worried about installing this filter myself, but it was incredibly easy. It fit perfectly on my faucet, and the water tastes fantastic. No more chlorine smell and looks great!

Piotr Menchly

Verified Buyer

Tested and it works

I tested the water before and after installing the filter… Glad it works… Even from taste alone I can tell the difference.

Shane W.

Verified Buyer

Apartment Renting

I live in an apartment, needed a filter that didn't require complex installation. This one was perfect and works great

Martin McDonald

Verified Buyer

Sustainable and convenient

I'm trying to reduce our plastic usage and this is such a great solution really conventient for daily use and the kids drink more water

Anna Doherty

Verified Buyer

Great daily use!

I tried Britta jugs, but with a large family, frequent refilling became a hassle. This is perfect for us. We enjoy clean water with significantly reduced plastic usage. Highly recommend!

Stephen Hennely

Verified Buyer

Cryptosporidium

We've had cryptosporidium outbreaks in ireland. Ceramic filters are highly effective at filtering this out so that's why I went with this system. Very convenient.

Frequently asked questions

OnTap stainless steel housing.
3 month Micron+ ceramic filter.
Adapters and fittings.
Instructions.

Subscribers also receive:

Discounts on all future filters.
Guaranteed stock.
Free shipping on all replacement filters.

Adapters for almost all standard kitchen taps are included.

If none of the adapters fit your tap (rare), we will send additional adapters free of charge.

In the unlikely event that your faucet is not compatible with OnTap, we will provide a refund under our faucet fit guarantee.

Please send us a photo of your faucet on Instagram or via email if you are unsure and would like confirmation for your tap before purchasing.

OnTap filters use three primary methods for filtration:

Micron+ ceramic outer:
- This ceramic outer layer has microscopic pores which allow water to pass while blocking bacteria, parasites etc.
Activated carbon:
- Activated carbon is the main component (often only component) used in standard filter jugs.
- Activated carbon bonds with contaminants in your water (THMs, pharmaceuticals, etc.), 'absorbing' them from your tap water.
- This later also absorbs chlorine and VOCs which cause poor tasting water.
Activated alumina:
- Activated alumina is a filtration media specifically designed for fluoride removal.
- Fluoride diffuses into activated alumina via ion exchange, 'absorbing' it from your tap water.

All of our filtration media are tested for quality to ensure adequate filtration.

There are additional layers in our filters to help with function and to separate filtration media from passing to the next stage.

Please email us if you would like to learn more about our filtration methods and our product team will help!

Our new Ceramic+ filters with fluoride removal last approximate 3 months or until 200L have been filtered.

Opt in for our Smart Refill Plan for the best price on replacement filters and so that you never miss a filter change.

OnTap filter housing as made to last, sustainability is one of our main goals.

Because of this, OnTap is made from 301 food grade stainless steel.

Yes! OnTap filters out chlorine and other contaminants that contribute to poor tasting water, guaranteed.

If you don't like the taste of your after trying OnTap, please email our support team so that we can help.

Yes, OnTap currently has a lifetime warranty on our filter housing.

This is a testament to our dedication to quality and sustainability.

OnTap combines the highest quality filtration methods, in a stainless steel housing, right on your kitchen tap.

We currently do not know of any other filtration company that can provide the quality, convenience and filtration coverage that we can, without expensive professional installations.

Shipping times in the ROI are currently 10-12 business days.

It is likely that you will receive your order before this, however, there is high demand and we are optimising our production line.

Please see our shipping policy page for more information.

You can cancel, pause or restart your Smart Refill Plan at any time using our portal - Subscription Portal.

You can also reach out to us at orders@ontapfilter.com for assistance.

Country/Region

Country/Region

Pure Water OnTap

EU Court Rules Against Ireland Over THM-Laced Water

EPA: 450,000 on At-Risk Water

52 Cases of Pesticides in Irish Drinking Water

EU Court Rules Against Ireland Over THM-Laced Water

EPA: 450,000 on At-Risk Water

52 Cases of Pesticides in Irish Drinking Water

Advanced filtration has never been easier

Purest taste

Purest taste

Advanced filtration

Advanced filtration

Convenient hydration

Convenient hydration

Cost saving

Cost saving

Claim Starter Offer - Only €54.99

Claim Welcome Offer - Only €54.99

OnTap Housing

€54.99

€67.99

3 Month Filter Supply

Free

€27.99

Free Delivery*

Free

€7.00

Total

€54.99

€102.98

Install in Less Than 10 Minutes

What does it filter?

THMs

What our customers say

Love getting new filters!

Fresh Taste

Super easy to install

Easy installation great taste!

Tested and it works

Apartment Renting

Sustainable and convenient

Great daily use!

Cryptosporidium

Frequently asked questions