Green Drain GD3/35 waterless trap seal with extended gasket for 3 to 3.5 inch Australian floor drains

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APAC Exclusive GD3/35

3-3.5" Waterless Trap Seal

Name: GD3/35 - Waterless Trap Seal (Extended Gasket)
Brand: Green Drain
SKU: GD3-35-EG
Price: 57.15 AUD
Availability: InStock

Extended gasket design bridges 3" to 3.5" drain openings for maximum compatibility across Australian plumbing systems. WaterMark certified.

$57.15 AUD

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

Pipe Size 3-3.5" (DN 75-90mm)

Flow Rate 105.70 L/min

Install Time 30 Seconds

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WaterMark Certified

ASSE 1072 Tested

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Cutaway view of a 3 to 3.5-inch floor drain and its trap

How it works.

Green Drain is a one-way valve for your floor drain. Water flows down and out. Nothing comes back up.

Inside sits a soft silicone valve. Running water pushes it open; the moment the water stops, it closes and seals tight against sewer gas, odours, and pests. Because it seals with silicone instead of water, it never dries out the way an ordinary trap can, even when the drain goes weeks without use.

It fits 3 to 3.5-inch drains, 75 to 90 mm, and drops in by hand. No tools, no plumber, installed in seconds.

Installs in 30 seconds. No tools.

Remove the drain grate

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

Drop in the GD3/35

Place the Green Drain into the drain body or hub opening. The extended gasket accommodates 75 to 90mm pipe diameters.

Press gently to seat

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

Replace the grate

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

ASSE 1072 tested. The data that matters.

The GD3/35 is tested to ASSE 1072-2020, the North American performance standard for barrier-type floor drain trap seal devices. WaterMark certified for the Australian market.

105.70 L/min Flow Rate (Level U) No restriction to commercial drainage.

32g Opening Force Approx 4 oz. Opens under minimal water weight.

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.

Download the Revit family set for every Green Drain model and find us listed in MasterSpec.

Download Revit Families View full specifications →

Technical Specifications

Model	GD3/35
Pipe Size	3-3.5" (75-90mm) / DN 80-90
Height	50 mm
Housing Material	ABS Plastic
Valve Material	Silicone Rubber
Seal Material	Silicone Gasket (Extended)
Flow Rate	105.70 L/min
ASSE 1072 Opening Force	32 grams
ASSE 1072 Cycle Life	>2,500 cycles
ASSE 1072 Evaporation Reduction	>96%
WaterMark License	WM-022837 (DN80)
Patents	Multiple US & international patents

Industries we serve.

The extended gasket design provides compatibility across Australian plumbing systems.

Healthcare Commercial Kitchens Schools Hotels Commercial Office Restaurants Industrial Food Processing

Certifications and compliance.

WaterMark Australia

WM-022837 (DN80)

ASSE 1072-2020 Standard

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

CE / ETA-18/0536

European Technical Assessment

NSF/ANSI 2

Food Equipment Certified

HACCP International

Food Safe Equipment & Materials endorsement, Certificate RG-04 (endorsement, not a certification)

DTI Test Report

Rapport 957187 (independent test report)

SGS

SGS Aerosol-Retention Test

Retained over 99.9% of an aerosolized MS2 bacteriophage viral surrogate

View All Certifications

What operators are saying.

"After installing your product in all our floor drains, we could see a noticeable difference in the reduction of fruit fly and mosquito activity. We were also very impressed that the flow rate of our trough drain remained consistent."

Mike Malone, Owner and Head Brewer

Walking Tree Brewery

"I am impressed with the simplistic design and the quality of the materials of construction. Just with the pest issue resolved alone we are sold."

Fred Wilson, Product Specialist

Sysco Central Florida

For specifiers and engineers.

The GD3/35 is WaterMark certified (WM-022837) for use in Australian plumbing installations. It meets the requirements of AS/NZS 3500 when installed as a supplementary trap seal device in floor drains.

Tested to ASSE 1072-2020 for flow rate, opening force, cycle endurance, and evaporation reduction. Compatible with DN 80 and DN 90 pipe sizes commonly found in Australian commercial buildings.

Specify the GD3/35 for projects requiring WaterMark compliance and broad pipe diameter compatibility. Request spec sheets or schedule a consultation with our technical team.

Specifier Resources
Technical drawing
or spec sheet preview
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Ready to protect your drains?

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