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Blog & Resources · Green Flow

Knowledge that
protects your facility.

Expert articles, case studies, technical guides, and resources on drain hygiene for hotels, hospitals, the food industry, and facility managers.

Featured article
01
📘 Guide
1 August 2026
6 min read
Guide

Drain smell — why it happens and how to fix it for good

The complete guide: the cause, why bleach and vinegar do not help, how fast a trap dries out, and what is done in homes, hotels, schools and hospitals.

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Green Drain™P-trapHomes and hotelsSchools and hospitals
Filter by industry
D
Drains
28 July 2026·4 min

Grease in kitchen drains — why it comes back and how to clear it

Grease does not dissolve; it cools and sets. Why hot water only moves the problem further down the pipe.

Read more →4 min read
U
Urinals
30 June 2026·5 min

Why a urinal smells even when it has just been cleaned

The odour is not on the ceramic. Urine scale in the drain throat, ammonia, and why a stronger cleaner makes it worse.

Read more →5 min read
U
Urinals
14 July 2026·4 min

Urine scale — why urinals block from the inside

A blockage is the last step of a process running for months. Early signs and prevention instead of remediation.

Read more →4 min read
D
Drains
7 July 2026·5 min

Blocked drain — what to do before calling a plumber

From lowest risk to highest. In three cases out of four it stops before any chemistry is needed.

Read more →5 min read
D
Drains
21 July 2026·4 min

Why caustic soda damages the pipes it clears

The reaction that dissolves the blockage is exothermic. What that heat does to PVC, seals and a septic tank.

Read more →4 min read
01
Technique & Specs
23 June 2026·7 min

Plumbers recommend: passive seals with a five-year service life

Drop-in design, no tools and no changes to the existing pipework — what do the people fitting them actually think?

Read more →7 min read
02
FM & Property
16 June 2026·8 min

ROI of passive drain seals in Irish facilities — with or without trap primers

Most Irish buildings have no trap primer infrastructure at all, yet the hidden costs are still there. A four-step ROI framework covering both scenarios.

Read more →8 min read
03
General
9 June 2026·8 min

Biofilm in Sewers — Why Bleach Isn't the Solution

Chlorine kills surface bacteria in 60 seconds. The biofilm underneath regenerates in a couple of hours. Bio-enzymatic degradation is the answer.

Read more →8 min read
04
Food industry
2 June 2026·6 min

HACCP and Drains in the Food Industry — A Forgotten CCP

BRC and IFS audits are increasingly requiring a documented drain control plan. What auditors ask and how to respond.

Read more →6 min read
05
Schools
26 May 2026·7 min

Why Irish schools smell of sewage on the first day of September

A 10-week summer, half-terms and the Christmas break leave every P-trap dry. The arithmetic that catches every Irish school, every year.

Read more →7 min read
06
Healthcare
19 May 2026·6 min

EU MDR Class I for Hospital Equipment — What It Means for Procurement

Guide for procurement, MEP designers and facility technical services in Irish HSE hospitals. EUDAMED registration, ISO 13485, HPRA-compatible.

Read more →6 min read
07
Healthcare
12 May 2026·6 min

Hospital drains as a source of infections — what IPC programmes overlook

58 reviewed studies link drains to reservoirs of Pseudomonas aeruginosa, Klebsiella, and NDM organisms.

Read more →6 min read
08
Hotels & HoReCa
5 May 2026·7 min

Dry P-traps in Irish hotel rooms — the cost of empty units

A trap in an unused room evaporates dry in two to three weeks — and the first guest back smells it before they reach the bathroom.

Read more →7 min read
09
Restaurants
28 April 2026·8 min

Flies in kitchen drains — why chemicals don't solve the problem

Pest control call-outs keep repeating because nobody shuts off the source. IPM Tier 1 mechanical barrier.

Read more →8 min read
10
General
21 April 2026·6 min

What a P-trap is, and why it dries out when nobody uses it

A small column of water that does more than people think. Two to three weeks unused and the smell is in the room.

Read more →6 min read
Technical Resources

Documentation
and guides.

SDS sheets, technical specifications, installation guides, and certificates — all in one place.

📄
Green Drain™ — Safety Data Sheet
Complete SDS document in accordance with EU regulations. Chemical composition, safety data, disposal.
📥 PDF · 420 KB
📄
GreenSwirl™ — Safety Data Sheet
SDS for sodium hydrogen sulphate granules. pH ~2, density 2.74 g/cm³, VOC 0 %.
📥 PDF · 380 KB
🔬
SGS Laboratory Test — Green Drain™
>99.9 % blockage of viral aerosols. Independent testing, methodology, and results.
External link
Installation Guide — Green Drain™
Step-by-step installation for every size. Thirty seconds per drain, and nothing to maintain afterwards.
📄 DOC · 1.2 MB
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Certificates & standards
SGS HACCP NSF/ANSI 2 CE cUPC WRAS ISO 9001 7 more
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