Name: Green Drain™ jednosmjerni silikonski ventil
Brand: Green Drain
Availability: InStock

Problem

The drain is direct.
a path to your building.

The P-trap loses its water barrier after a few days of non-use, leaving an open path for gases.

☠️
H₂S, methane, ammonia
Toxic and flammable sewer gases travel through the dry trap. H₂S is toxic at 10 ppm and fatal at 100 ppm.
🦠
Pathogenic and viral aerosols
23 documented hospital outbreaks linked to drains (Carling, 2018). CRE, MRSA, Pseudomonas — direct route through the drain. Green Drain™ has been proven to block >99.9% of viral aerosols.
📉
Negative reviews and guest complaints
There is a direct correlation between odour and a drop in ratings on Booking and TripAdvisor. One negative review costs more than an annual property protection plan.

Floor drain without a trap — pests and gases pass through freely.

Carling et al. — Am. J. Infect. Control, 2018

documented hospital epidemic outbreaks linked to steam drains

CRE

Carbapenem-resistant enterobacteria

MRSA

Methicillin-resistant Staphylococcus

VRE

Vancomycin-resistant Enterococcus

And so on

Pseudomonas aeruginosa

Product

Green Drain™
Check valve

Medical-grade silicone rubber. Four flexible ribs that adapt to any drain diameter. No glue, no expensive tools.

30 seconds

Tool-free installation

5+ years

Expected lifespan

11 sizes

32mm – 152mm

0 liters

Annual water consumption

Green Drain™ — cross-section of a check valve with installed protection

Need a quote for? Order online — available immediately, fast shipping to Croatia and countries in the region.

Buy now →

Provability

It is not a marketing claim.
Independently verified by SGS.

>99.9%

Blockade of viral aerosols
SGS Report QDF25-0049810-01

Organisation

SGS S.A. — an independent Swiss certification company

Life test

ASSE 1072-2020 · 2500+ usage cycles

Certificates

SGSHACCPNSFCEcUPCASSEEU MDR 2017/745

SGS Control Group (without Green Drain™)

18.000 – 72.500

PFU of viral particles detected above the drain

SGS with GD 3 installed

Less than 5 PFU

Below the detection threshold · all 3 test circuits

Laboratory

SGS-CSTC
CNAS L0604 accreditation

Surrogate: MS2 bacteriophage (ATCC 15597-B1)

93×

Silicone strength above minimum (CRT Lab)

International certifications · 7 independent laboratories

2.500

ASSE cycle · 32 g opening force (IAPMO)

1.500+

Thermal cycles without degradation (DTI)

One-way silicone valve

Block ↑

Sewage gasesH₂S, methane, ammonia
Viral aerosols99.9% SGS
Bacteria and biofilmCRE, MRSA, Pseudomonas
Parasites and unpleasant odoursFlies, cockroaches, and the stench of sewage

Green
Drain™

Allows

Full water flowGD1.25: 29,22 L/min · GD6: ≥550 L/min
Easy cleaningRinse with warm water as needed.
Floor washing procedurePasses all waste without clogging.
Drain maintenanceQuick and easy removal

>99.9%

SGS · 58 studies · 2500+ ASSE · 14 certificates

SGSHACCPNSFCEEU MDR 2017/745

Solution	Blockade	Aerosols	Water/god	Service
Green Drain™	✓ always	✓ >99.9%	0 liters	30 seconds
P-trap	It's drying out	No	variable	regularly

How does it work?

Physics, not chemistry.
Permanent protection.

Four silicone ribs hold the seal without glue. The weight of the water opens the valve. Without water—flow is shut off. Always.

At rest — closed

Gravity keeps the valve closed. An absolute barrier. It doesn't evaporate, it doesn't dry out.

When washing — open

The weight of the water opens the valve and ensures full flow.

Service — 30 seconds

It's removed without tools, rinsed under warm water, and put back in place.

Proven long-term durability in industrial conditions

Medical-grade silicone rubber. 2500+ ASSE cycles.

ASSE 1072-2020 · IAPMO 1554-25004

Request an audit → Library of Studies

▶ Video demonstration

Fitted in 30 seconds. See for yourself.

Lift the grate, drop the seal into the drain body, put the grate back. That is the whole job. No plumber, no tools, no adhesive and no pipework — and the seal works from the first second.

Certificates

14 international
certificate

100+ countries — EU, North America, Australia, Scandinavia.

cUPC Listed

IAPMO File 9301 · until 2029.

ASSE 1072-2020

46 states of the USA · Canada

CE / ETA-18/0536

ETA-Denmark · 27 EU countries

NSF/ANSI 2

C0571796 · Food equipment

HACCP International

RG-04 · SSZ zone · until 2026

WaterMark Australia

WM-022837 · WMTS-522:2021

Prop 65 Compliant

CTT Lab · Lead & Phthalates: PASS

SGS Pathogen Test

QDF25-0049810-01 · CNAS L0604

Tested by DTI

226049 & 957187 · Tax Reg. 300

IAPMO Research & Training

Flow, evaporation, life cycle

Approval of the VA

Danish standard · Scandinavia

CRT Material Test

23.38 kN/m · 93× above min.

Do you need documentation for the project? Special Pack 2025 — all certificates and technical data in a single PDF.

Download PDF →

Sizes

11 models.
Every drain covered.

Model	Diameter	Flow	Height	Application
GD 1.25 →	1.25″ / DN32	29.22 L/min	26 mm	Condensate drains, shower channels
GD 1.5 →	1.5″ / DN40	51.55 L/min	28 mm	Shower drains, traditional P-traps
GD 2 →	2″ / DN50	82.50 L/min	33 mm	Residential buildings, hospitality
GD 2.5 →	2.5″ / DN65	72.50 L/min	35 mm	Showers, urinals, floor drains
GD 3 →	3″ / DN80	105.70 L/min	51 mm	Showers, urinals, floor drains
GD 3-3.5 →	3-3.5″ / DN80-90	105.70 L/min	50 mm	Commercial kitchens, traditional P-traps
GD 3.5 →	3.5″ / DN90	323.17 L/min	51 mm	Public restrooms, showers
GD 3.5-4 →	3.5-4″ / DN90-100	323.17 L/min	50 mm	Industrial kitchens, hotels, public restrooms, showers
GD 4 →	4″ / DN100	≥340 L/min	51 mm	Food service kitchens, commercial drains
GD 5 →	5″ / DN125	391 L/min	42 mm	Industrial floor drains, urinals
GD 6 →	6″ / DN150	≥≥550 L/min	51 mm	Commercial kitchens, manufacturing, airports

Not sure which size you need? Send a photo of the drain — free model recommendation.

Ask us for advice →

Industries

Every environment
Requires protection.

Green Drain in 8 key sectors — all dimensions, all traps, EU regulatory frameworks.

Hotels and resorts

General cleaning in all guest bathrooms, the wellness area, and F&B facilities. The seal holds through seasonal closures—no dried-out traps in vacant rooms.

Learn more →

Hospitals and clinics

EU MDR Class I barrier for IPC programs. Passive protection of ICUs, operating rooms, and isolation units against H₂S and aerosols.

Learn more →

Restaurants and kitchens

HACCP-compliant CCP for drain contamination. Mechanical barrier against fruit flies in kitchen floors.

Learn more →

Food industry

EU 1935/2004 food-safe. CCP for drainage contamination in plants, cold storage facilities, and packing houses.

Learn more →

Airports

Thousands of terminal drains sealed without continuous operation. The seal survives nighttime low-flow periods.

Learn more →

Schools and halls

Seven-week summer breaks drain every P-trap. GD remains sealed throughout the entire summer break—no ritual rinse in September.

Learn more →

Industry and warehouses

H₂S and methane barrier for worker safety. ATEX-compliant design, resistant to CIP/SIP processes.

Learn more →

Nursing homes

Protection of immunocompromised patients from H₂S, viruses, and bacterial aerosols from drains. EU MDR documentation.

Learn more →

Detailed sector guide: 18 industries with size recommendations, EU certifications, and the HR regulatory framework.

All industries → Free audit

EU MDR 2017/745 · Medical device

Green Drain™ is a
Class I medical device
under EU MDR

A one-way floor drain valve classified as a Class I medical device under Regulation (EU) 2017/745. Conformity is self-declared by the manufacturer under Annex IV — for Class I devices that are non-sterile and have no measuring function, no notified body is involved. Manufactured under ISO 13485:2016.

🏥

Class I

Classification
MDR risk

EUDAMED

Manufacturer SRN
DK-MF-000052289

⚙️

ISO 13485

Production under
medical QMS

🌍

27 EU countries

Covered
EU Declaration of Conformity

✓ Green Drain™

✓

Acts as a one-way mechanical barrier in floor drains.

✓

Blocks the upward flow of air and aerosols from the sewer network.

✓

Supports infection prevention and control (IPC) programs

✓

Reduces pathways of exposure to pathogens through floor drains.

✗ Green Drain™

✗

Does not prevent, diagnose, treat, or cure diseases.

✗

It does not guarantee a reduction in infection rates or clinical outcomes.

✗

Does not replace established hygiene and disinfection protocols.

✗

Does not come into direct or indirect contact with the patient's body.

Why MDR Class I?

Green Drain™ is non-invasive, non-sterile, and without measurement functions — does not come into contact with the body. According to Annex VIII of the MDR classification rules, this places it in the lowest risk level.

Despite its low class, the production system is satisfactory. ISO 13485:2016 — medical device standards — including traceability by lot and change control.

EUDAMED SRN

DK-MF-000052289

Basic UDI-DI

5745001471GreenDrainMDRJD

Certification

ISO 13485:2016 + ISO 9001:2015

Publicly available regulatory documents

EU Declaration of Conformity

Declaration of Conformity

MDR 2017/745 Compliance Declaration Signed — All 8 Variants

↓ Download PDF

IFU

Instructions for use

Intended use, installation, warnings, materials, traceability

↓ Download PDF

Technology

Technical summary

For architects, engineers, and IPC consultants — ASSE, ETA, QMS

↓ Download PDF

Regulatory summary

An explanation of the MDR status in simple language for non-technical stakeholders

↓ Download PDF

Economic operators and regulatory information

ManufacturerGreen Drain (greendrains.com). Conformity information is taken from the manufacturer's documentation.

DistributorGREEN FLOW d.o.o., Savska cesta 41, 10000 Zagreb, Croatia, OIB 92557545052 — distributor within the meaning of Article 14 of Regulation (EU) 2017/745.

ClassificationClass I under Annex VIII of Regulation (EU) 2017/745. Conformity is self-declared by the manufacturer under Annex IV; no notified body is involved and no third-party MDR certificate exists.

Two CE marksCE under Regulation (EU) 2017/745 (medical devices) and, separately, CE under Regulation (EU) 305/2011 (construction products, ETA-18/0536). These are two distinct regimes.

Before useRead the manufacturer's instructions for use. We send the IFU and the Declaration of Conformity on request: info@greenflow.ie.

Incident reportingReport a suspected defect or incident to info@greenflow.ie. We keep a complaints register and forward reports to the manufacturer and the competent authority.

Installation

Installation in
Thirty seconds.
So simple.

No plumber. No tools. No fixtures. The entire facility in one afternoon.

7-day free trial

We come, install samples at critical points. You evaluate. No cost. No obligation.

Drain identification

Measure the diameter — Green Flow will send an accurate model for free.

Measure the diameter — choose a model

Internal diameter of the pipe (not the grate).

Drop-in — 30 sec/each

Silicone ribs are secured without glue. 30 seconds per drain.

Annual review — that's all

Silicone membrane. No service contracts.

Step 1

Take off the grate.

Remove the existing grate or strainer from the drain.

Step 2

Insert Green Drain™

Lower the seal 5–10 cm into the drain body for optimal flow.

Step 3

Press on the spot

The silicone ribs conform to the drain and lock in place. It works immediately.

Step 4

Return the grate

Done. 30 seconds of work, lasting security.

FAQ

Frequently Asked Questions

Yes. Green Drain is available in 11 sizes from 1.25″ to 6″ with a ±2 mm tolerance thanks to its silicone ribs. It fits every standard drain.

No. Drop-in design — just drop it into the drain. No tools, no glue. 30 seconds per drain.

No, Green Drain allows full water flow.

Expected service life is about 5 years according to ASSE 1072-2020 (2500+ cycles · IAPMO 1554-25004). Medical-grade silicone resistant to chemicals and temperatures from -40°C to +200°C.

Green Drain is especially effective here. A standard P-trap dries out in a few days, while Green Drain stays sealed without water—ideal for seasonal facilities.

Yes — we come to the site and leave samples for 7 days free of charge. You decide. No cost, no obligation.

There is no minimum order for B2B. Order as much as you need.

Optimally 5–10 cm below the end of the tube. Silicone housings are compressed for a snug fit—no glue.

In most cases, no — Green Drain is a removable, non-installed device that does not alter the installation. For commercial properties, check local regulations.

Yes. The medical-grade silicone has been tested at –40 °C (no brittleness) and 100 °C (hot water, steam). It is chemically resistant to sulfuric acid, NaOH, and standard disinfectants according to CRT laboratory testing.

Green Drain™
Patented protection
for floor drains

The drain is direct.
a path to your building.

Green Drain™
Check valve

It is not a marketing claim.
Independently verified by SGS.