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September 15, 2018 at 8:39 pm #1480
In T2 airside, a water fountain is located across from gate 407, next to the escalators.August 14, 2018 at 7:31 pm #1322
There is a water fountain outside the toilets between departure gates 104 and 106 in terminal 1 (I assume there are more elsewhere)
Chris SSeptember 4, 2017 at 9:09 pm #385
From DAA website
Are there drinking water fountains at Dublin Airport?
Drinking water fountains are available in Terminal 1 on the Departures and Arrivals level, in the baggage reclaim area and at Gates 100, 200 and 300. Fountains are available in Terminal 2 in the following areas,: check-in, baggage reclaim, shopping/restaurants and at the entrance to Gates 400.