Until recently, Irish food production facilities — Kerrygold, Moy Park, Dawn Meats, Glanbia, Diageo, Heineken Ireland and the dairy co-operatives — treated drains as background infrastructure. BRCGS Issue 9 (2024), IFS Food Version 8, and updated FSAI inspection guidance have changed that. Drain control plans are now an explicit audit point in Irish food safety certification, and the question is no longer whether to address drains but how to document the approach.
What changed in BRCGS Issue 9 and IFS Food v8
BRCGS Global Standard for Food Safety Issue 9 (2024) introduced an explicit requirement under Clause 4.11 (Housekeeping and hygiene) for documented control of drainage systems including the management of biofilm risk, odour control, and pest harbourage. Auditors now expect:
- Map of all drains in production areas
- Documented cleaning schedule per drain category
- Risk-based prioritisation (high-care vs. ambient zones)
- Evidence of pest monitoring related to drain points
- Where applicable, mechanical barriers or trap monitoring
IFS Food Version 8 (2023) made similar changes under section 4.10 (Pest Monitoring and Pest Control) and section 4.16 (Maintenance and Repair), explicitly naming drain biofilm and trap drying as identified risks.
FSAI inspection focus
The Food Safety Authority of Ireland (FSAI) and the official agency inspectors operating under it (Department of Agriculture for slaughterhouses and meat plants, Local Authority Veterinary Services, HSE Environmental Health Officers) have aligned with the BRC/IFS direction. In practice, Irish food production facility audits in 2025–2026 are increasingly asking:
- Where are your high-risk floor drains located?
- What is your cleaning frequency for each?
- How do you control fruit-fly populations (Drosophila species) in drains?
- How do you document that drain odour does not contaminate finished product zones?
- What is your trap-drying mitigation in seasonally low-use areas?
Facilities that have a documented mechanical drain barrier programme are finding these questions easier to close out than those relying on chemical treatment regimes.
The drain as a CCP candidate
Whether the drain qualifies as a Critical Control Point (CCP) depends on the HACCP team's hazard analysis. In most Irish food production contexts the drain is not a CCP for the finished product — but it is a recognised hazard source, particularly for:
- Listeria monocytogenes — established drain coloniser in cheese, ready-to-eat meat, and smoked fish production. Documented in multiple EU outbreak investigations.
- Salmonella spp. — drain biofilm reservoir in poultry processing, pet food and confectionery facilities.
- Pseudomonas spp. — drain reservoir affecting dairy chillers and beverage line CIP systems.
- Drosophila and Phoridae flies — IPM concern across all food production. Biofilm in drains is the primary breeding substrate.
What good drain control looks like in an Irish food facility
A documentable, audit-friendly drain control plan typically includes:
- Drain map. Floor plan with every drain point identified, numbered and risk-zoned.
- Mechanical barrier specification. Passive one-way silicone valve installed in each high-risk drain. NSF/ANSI 2 listed (C0571796) material (food-contact relevant material standard).
- Cleaning protocol. Daily visual check, weekly deep-clean of accessible drain components, quarterly removal and rinse of the silicone valve.
- Monitoring. Drosophila trap counts trended by location; any spike triggers drain investigation and additional cleaning.
- Verification. Periodic ATP swabbing of drain components and adjacent floor surfaces; environmental Listeria swabbing per FSAI guidance for high-risk product categories.
- Records. All of the above logged in the QMS, ready for BRC, IFS, FSAI, customer audits.
Material certifications relevant to Irish food production
When specifying a mechanical drain barrier for a BRCGS or IFS-certified Irish facility, look for:
- NSF/ANSI 2 — Food equipment material safety, applicable for components in contact with food processing water
- HACCP International RG-04 — Recognised as compatible with food processing CCP frameworks
- FDA 21 CFR 177.2600 — Silicone rubber for repeated food contact applications (US standard, frequently cross-referenced in EU food spec)
- EU 1935/2004 — Materials and articles intended to come into contact with food
- FCM Plastics Regulation (EU) 10/2011 — Specific to plastic and silicone material in food processing equipment
Full guide: drain smell — causes and a permanent fix — why traps dry out, why bleach and vinegar do not help, and what is done in homes, hotels, schools and hospitals.