Built for commercial kitchens and food processing. The highest flow rate under 4 inches. 85.37 GPM. Drop-in install, no tools required.
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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 (27.92 GPM) to the GD35 (85.37 GPM), handling heavy wash-down operations without restriction.
Independently tested performance data. The GD35 delivers 3x the flow capacity of the GD3 at Level U.
| 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 (Level C) | 32.12 GPM |
| Flow Rate (Level U) | 323.17 L/min |
| Flow Capacity (DTI) | 193.0 L/min (2.3 L/s) |
| Pressure Resistance (DTI) | 502 Pa |
| Patents | US 7,900,288 · US 9,027,172 |
Lift the existing drain grate or strainer from the floor drain body.
Place the Green Drain into the drain body or hub opening.
The silicone gasket creates a snug seal against the pipe walls.
Put the grate back. Done. A full commercial floor in an afternoon.
Handy accessories for Green Drain owners.
Purpose-built for quick, clean removal of any Green Drain. Simply hook and lift.
$6.95
Identify drain sizes in the field. Measure the inside diameter to find the right model.
$6.95
The 3.5" floor drain is common in commercial kitchens, food processing facilities, and brewery operations where high flow capacity is essential.
IAPMO File 9301
Trap seal performance standard
European Technical Assessment
Food Equipment Certified
Certificate RG-04
WM-022837 (DN80)
California Material Safety
>99.9% blockage of viral aerosols
Rapport 957187
Certified Testing Lab
Danish Plumbing Approval
Drop-in install. No tools. Works from day one.
