Hydrogen sulfide and other sulfide gases from the drain biofilm cause "creep corrosion" on the motherboard's gold contacts and silver solder joints. It appears months after the problem begins. Green Drain™ eliminates the H₂S source — a safety measure for uptime.
The ASHRAE TC9.9 and Telcordia GR-63 guidelines recommend limits for corrosive gases in spaces housing IT equipment. If drain biofilm is not under control, actual values in the building can exceed those recommendations.
The ASHRAE TC9.9 guidelines and the Telcordia GR-63-CORE industry requirements set recommended limits for corrosive gases in spaces housing IT equipment. The Uptime Institute rates reliability from Tier I to Tier IV, and ANSI/TIA-942 further describes environmental requirements. These are industry guidelines and standards, not legislation. Separately, more customers are asking for their data to be hosted in Croatia — usually for contractual reasons and because of their own clients' requirements, rather than because the General Data Protection Regulation explicitly requires it.
Statistical data were taken from official sources: State Statistical Office (data.dzs.hr) Croatian Institute of Public Health (hzjz.hr), Ministry of Labor, Pension System, Family and Social Policy (mrosp.gov.hr), Agency for Science and Higher Education (azvo.hr), Ministry of Tourism and Sports (mint.gov.hr). Regulatory framework: EUR-Lex for EU directives and regulations — Regulation (EU) 2017/745 (MDR), Regulation (EC) No 178/2002 (general principles of food law), Regulation (EC) No 852/2004 (food hygiene — HACCP obligation), Regulation (EC) No 1935/2004 and Regulation (EU) No 10/2011 (food contact materials), Regulation (EU) No 528/2012 (BPR), Directive 2014/34/EU (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), ASSE 1072-2020 (floor drain trap seal protection devices) and NSF/ANSI 2 (food equipment). HACCP International RG-04 is a private certification programme operated by HACCP International, not an official certification issued by a public authority. Tourism data taken from the DZS publication for H1 2025, healthcare data from the HZJZ report 2024, data for education from DZS publications for the 2023/2024 and 2024/2025 school years, data for nursing homes from the MROSP report, and announcements of EU-funded construction in 2025. Revision date: May 2026.
The data centre doesn't allow improvisation. Everything goes through formal change management and a maintenance window. Our installation takes 30 minutes per washroom.
Data centre drainage system overview — where the P-traps are in relation to the machine room.
Sanitary fixtures and corridor — 30 days, measurement of H₂S and SO₂.
Formal process — enters the maintenance schedule.
Maintenance window — one per washroom every 30 minutes.
Croatian data centres (Combis, A1, HT, Span, S&T, Altus IT, MainStream) are built to Tier II–IV standards. Sanitary and staff auxiliary rooms are built conventionally (50–58 mm). The mechanical zone, CRAC rooms, and UPS rooms are the technical side — required to withstand temperatures up to +60 °C in hot aisles.
We are sending the technical documentation, the EN 1253 compatibility note and the ASSE 1072-2020 test report. The auditor is requesting proof that the risk of corrosive gases is controlled — the drainage system is part of that control.
Yes. Pre-installation and post-installation measurements of H₂S, SO₂, and CH₄ at strategic points in the area.
Green Drain™ doesn't work alone — for maximum drain control it's combined with GD Uri-Tabs™ (urinals) and GreenSwirl™ (drain unblocking).
Patented silicone seal for floor drains in mechanical rooms and washroom facilities. design aligned with the ASHRAE TC9.9 guidelines that does not disrupt the temperature profile.
Bio-enzyme urinal tablets for operating room washrooms. No volatile chemicals that could enter the HVAC system.
Biofilm cleaning in the sewer systems of administrative zones. No harsh chemicals that corrode metals (H₂S is the source of the problem).
We come to the site, map the drains, and provide a written recommendation — no cost, no obligation.