The airport operates 24 hours a day, so there is never a convenient moment to take floor drains out of service. Seasonal peaks at Dublin, Cork and Shannon — summer, Christmas and big sporting fixtures — stretch cleaning teams further still.Green Drain™ is a passive one-way silicone insert that keeps the drain closed when nothing is flowing, so odours and sewer gases stay in the pipe. It has no moving parts to service and an expected service life of about five years.
The terminal operates 18–24 hours a day, and hangars and technical support work around the clock. Passenger washrooms are heavily used during the day and barely used at night, and any trap left unused for two to four weeks will lose its water seal.
Dublin Airport, operated by daa, handled 33.3 million terminal passengers in 2024; Dublin and Cork together handled 37.7 million. Cork (ORK) and Shannon (SNN) are the other international gateways. Terminal washrooms, airline lounges and food and beverage outlets are where drain odour is noticed first, because throughput is high and the building never closes.
Statistical data taken from official Irish and EU sources: Central Statistics Office Ireland (cso.ie), Health Service Executive (hse.ie), Fáilte Ireland (failteireland.ie), Bord Bia (bordbia.ie), IDA Ireland (idaireland.com), Health Products Regulatory Authority (hpra.ie). Regulatory framework: EUR-Lex for EU directives — EU 2017/745 (MDR), EC 852/2004 (food hygiene, HACCP), EU 1935/2004 and EU 10/2011 (food contact materials), EU 528/2012 (BPR), EU 2014/34 (ATEX). Standards: EN 1253-1 (floor P-traps, water seal ≥50 mm), EN 1253 Parts 6/7/8 (gullies with a water seal below 50 mm, with mechanical closure, and combined types; 2023 editions), HACCP International RG-04, ASSE 1072-2020, NSF/ANSI 2, HSE AMRIC (Antimicrobial Resistance and Infection Control) guidance. Notes on status: Green Drain™ is an insert fitted into an existing drain, not a factory-made gully, so it is compatible with drains built to EN 1253 rather than certified to it; it is classified Class I under EU MDR 2017/745 with conformity self-declared under Annex IV (the manufacturer is registered in EUDAMED under SRN DK-MF-000052289 — there is no third-party MDR certificate), it does not prevent, diagnose or treat disease and supplements rather than replaces infection prevention and control protocols; NSF/ANSI 2 evidence is a listing (C0571796); HACCP International RG-04 is a private certification programme and it remains for the operator to decide whether to include the product in their own HACCP plan. Revision date: May 2026.
Most large airports have a four- to six-hour quiet period overnight. We work zone by zone in that window, escorted by security where required.
Our technician maps the terminal, hangar and customs areas under escort.
One washroom or customs zone, reviewed after 30 days.
Sizes and locations are written up and added to the airport's planned maintenance system.
By zones during the night slots — one zone = one night.
Irish airports (Dublin, Cork, Shannon, Kerry, Knock, Donegal) each have structurally distinct zones. Passenger washrooms are mostly 50–58 mm. Airline lounges vary. Hangars, MRO workshops and cargo areas are industrial in scale.
Green Drain™ works best alongside GD Uri-Tabs™ for urinals and GreenSwirl™ for clearing biofilm and slow drains.
Patented silicone insert for terminal floor drains. It keeps the drain closed during quiet periods overnight, so sewer gas such as hydrogen sulphide stays in the pipe.
Bio-enzymatic tablets for terminal urinals, which see heavy use around the clock. Each tablet lasts 30–45 days, so fewer call-outs during peak hours.
Breaks down biofilm in terminal and back-of-house washroom drains. Helps control seasonal odours in gate areas and the food court.
We come to the site, map the drains, and provide a written recommendation — no cost, no obligation.