Green Drain™ · 4″ · DN100

Green Drain™ 4″
Large kitchen.

Name: Green Drain™ 4"
Brand: Green Drain
SKU: GD-4
Price: 48,99 EUR
Availability: InStock

4 inches / DN100 / grate internal diameter 102–110 mm

Large size for industrial kitchens, hotel wellness centres, washing sports halls, and butcher shops. The second best-selling model after the 3″.

48,99 € · VAT included

Price excluding VAT: 39,19 €

In stock in Zagreb · delivery 24–48 hours in HR, 3–5 days in the EU

Request a quote → Buy now →

Price includes Croatian VAT (25%). Businesses are invoiced VAT-exempt against a valid EU VAT number. Delivery: Croatia €9.99 · Slovenia €11.99 · Bosnia and Herzegovina €17.99 · Serbia €18.99. Rates apply to consignments up to 2 kg; for heavier consignments and other EU countries, send an enquiry.

R1 invoiceFor businesses

HACCP Int. RG-04NSF/ANSI 2SGS QDF25-0049810-01CE ETA-18/0536EU MDR 2017/745 (Class I)ASSE 1072-2020CSA B79-2008cUPC IAPMO 9301

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Technical specification

Green Drain™ 4″ (GD-4) — silicone seal with ABS frame. All manufacturer specifications.

Size

4″ (DN100)

Seal material

Medical silicone

Frame material

UV and chemical resistant ABS

Built-in unit height

51 mm

Maximum flow

≥340 L/min

Temperature range

−40 °C to +100 °C (briefly 120 °C)

Seal life

5 years with normal use

ASSE 1072 cycles

2,500+ test cycles

Aerosol Blockage (SGS)

99.9% MS2 surrogate

Packaging

1 piece in a box + instructions

Weight

125 g

What is Green Drain™?

Patented one-way silicone seal that is installed in the body of an existing floor drain. Under the weight of water it opens downward, and at rest it remains hermetically sealed upward—physically blocking sewer gases, viral aerosols, and insects.

No water in the P-trap, no chemicals, no maintenance. Medical-grade silicone, proven long-lasting durability, SGS-tested to block >99.9% of MS2 viral surrogates.

Learn more about Green Drain™ →

Installation in 30 seconds.

No plumber needed. No tools. No cutting into existing pipes. DIY or professional installation.

Step 1

Take off the grate.

Remove the existing grate or strainer from the drain.

Step 2

Insert Green Drain™

Lower the silicone seal 5–10 cm into the drain body.

Step 3

Press on the spot

Silicone ribs adjust to the diameter. It works immediately.

Step 4

Return the grate

Done. 30 seconds of work, lasting security.

Questions about this size.

Customer FAQs for GD-4.

GD-4 is for P-traps with a grate inner diameter of 102–110 mm. It's best to measure before ordering—our return policy covers incorrect sizes for 14 days.

No. The GD-4 leaks ≥340 L/min—more than a normal load delivers at once. The seal opens downward under the weight of the water.

Wet cloth for regular floor cleaning. The seal remains in the drain; the grate is removed from above it. Visual inspection once a year.

Yes. Silicone is resistant to sodium hypochlorite up to 5%, quaternary amines, isopropanol, and ethanol at standard food service and hospital concentrations.

Yes. Green Flow d.o.o. is the exclusive distributor of Green Drain™ for the Adria region. Each unit comes with the manufacturer's original QR code and serial number.

Not sure if 4″ is your size?

Send us a photo of your P-trap and our technical support will recommend the exact size — free of charge, the same business day.

GD 4″ fits a drain body with an internal diameter of 102–110 mm. If your measurement falls in that range, this is your size.

Lift the grate

Take out the existing grate or strainer. Underneath is the drain body — the pipe the seal drops into.

Measure the internal diameter

Measure the pipe opening, not the grate. The grate is always wider, and that is the single most common reason people order the wrong size.

Match it to a range

Find the size whose range your measurement falls into. If you are between two, take the smaller one — the silicone ribs expand.

No tape measure to hand? A strip of paper works: wrap it around the opening, mark where it overlaps, measure that length and divide by 3.14. And if you still get the size wrong, there is a 14-day return — send it back and we swap it, no questions.

Green Drain™ 4″
Large kitchen.