Waterless Trap Seals for Australian Drain Sizes. Free Shipping Over $100 AUD
Green Drain GD35 waterless trap seal for 3.5-inch kitchen floor drains
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GD35

3.5" Waterless Trap Seal

Fits 3.5" (DN90) drain outlets. Highest flow rate under 4 inches at 323.17 L/min. Drop-in install, no tools required.

$57.15 AUD

Inc. GST. Free shipping on orders over $100 AUD. $10 flat rate standard shipping.

Pipe Size 3.5" (89-100mm)
Flow Rate 323.17 L/min
Install Time 30 Seconds
WaterMark Certified
ASSE 1072 Tested
Free Shipping Over $100

How it works.

Four flexible silicone sealing ribs form a one-way valve. Water, cleaning solutions, and food waste pass through under gravity. When flow stops, the ribs close to create a continuous mechanical seal.

The flexible design accommodates pipe diameters from 89 to 100 mm. The flow capacity jumps significantly from the GD3 (105.70 L/min) to the GD35 (323.17 L/min), handling heavy wash-down operations without restriction.

Green Drain cross-section diagram showing one-way valve open during flow and closed to block sewer gas and pests

Installs in 30 seconds. No tools.

1
Step 1: Remove the drain grate

Remove the drain grate

Lift the existing drain grate or strainer from the floor drain body.

2
Step 2: Drop in the Green Drain

Drop in the GD35

Place the Green Drain into the drain body or hub opening.

3
Step 3: Press gently to seat

Press gently to seat

Recess 2 to 4 inches below the pipe top. The silicone gasket creates a snug seal against the pipe walls.

4
Step 4: Replace the drain grate

Replace the grate

Put the grate back. Done. A full commercial floor in an afternoon.

Built for high-volume drainage.

Independently tested performance data. The GD35 delivers over 3x the flow capacity of the GD3 at Level U.

323.17 L/min Flow Rate (Level U) 3x the flow capacity of the GD3.
502 Pa Pressure Resistance DTI tested back-pressure rating.
2,500+ Cycle Endurance ASSE 1072 tested open/close cycles.
>96% Evaporation Reduction Keeps trap seal intact without water priming.
For Architects & Engineers

Specify Green Drain in your next project.

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Technical Specifications

ModelGD35
Pipe Size3.5" (89-100 mm) / DN90
Height51 mm
Housing Diameter (no gasket)78.75 mm (3.100"), bottom 83.6 mm (3.291")
Housing with Gasket97.46 mm (3.837") wide x 50.82 mm (2.001")
Housing MaterialABS Plastic
Valve MaterialSilicone Rubber
Seal MaterialSilicone Gasket
Flow Rate323.17 L/min
Pressure Resistance (DTI)502 Pa
WaterMark LicenseWM-022837 (DN90)
PatentsMultiple US & international patents

Certifications and compliance.

Green Drain WaterMark Australia certification WM-022837

WaterMark Australia

WM-022837

ASSE 1072-2020 Standard

Barrier-type trap seal performance standardEvaluated under IAPMO R&T cUPC File No. 9301

Green Drain NSF/ANSI 2 food equipment certification

NSF/ANSI 2

Food Equipment Certified

Green Drain HACCP International food safety endorsement

HACCP International

Certificate RG-04

Green Drain CE Mark European Technical Assessment ETA-18/0536

CE / ETA-18/0536

European Technical Assessment

SGS

SGS Pathogen Test

>99.9% blockage of viral aerosols

Green Drain tested by Danish Technological Institute DTI

DTI Tested

Rapport 957187

Ready to protect your drains?

Drop-in install. No tools. Works from day one.