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
Main
GD35

3.5" Waterless Trap Seal

Built for commercial kitchens and food processing. The highest flow rate under 4 inches. 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

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.

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

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.

Where the GD35 is used.

The 3.5" floor drain is common in commercial kitchens, food processing facilities, and brewery operations where high flow capacity is essential.

Certifications and compliance.

Green Drain WaterMark Australia certification WM-022837

WaterMark Australia

WM-022837

Green Drain ASSE 1072-2020 barrier-type trap seal certification

ASSE 1072-2020

Trap seal performance standard

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.