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.
Inc. GST. Free shipping on orders over $100 AUD. $10 flat rate standard shipping.
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 3.5-inch drains, 89 to 100 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 GD35
Place the Green Drain into the drain body or hub opening.
Press gently to seat
Recess 2 to 4 inches below the pipe top. The 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.
Built for high-volume drainage.
Independently tested performance data. The GD35 delivers over 3x the flow capacity of the GD3 at Level U.
Specify Green Drain in your next project.
Download the Revit family set for every Green Drain model and find us listed in MasterSpec.
Technical Specifications
| Model | GD35 |
| Pipe Size | 3.5" (89-100 mm) / DN90 |
| Height | 51 mm |
| Housing Diameter (no gasket) | 78.75 mm (3.100"), bottom 83.6 mm (3.291") |
| Housing with Gasket | 97.46 mm (3.837") wide x 50.82 mm (2.001") |
| Housing Material | ABS Plastic |
| Valve Material | Silicone Rubber |
| Seal Material | Silicone Gasket |
| Flow Rate | 323.17 L/min |
| Pressure Resistance (DTI) | 502 Pa |
| WaterMark License | WM-022837 (DN90) |
| Patents | Multiple US & international patents |
Industries we serve.
The GD35 fits 3.5" (DN90) drain outlets.
Certifications and compliance.
WaterMark Australia
WM-022837
ASSE 1072-2020 Standard
Barrier-type trap seal performance standardEvaluated under IAPMO R&T cUPC File No. 9301
NSF/ANSI 2
Food Equipment Certified
HACCP International
Certificate RG-04
CE / ETA-18/0536
European Technical Assessment
SGS Aerosol-Retention Test
>99.9% MS2 viral-surrogate retention
DTI Tested
Rapport 957187
Ready to protect your drains?
Drop-in install. No tools. Works from day one.