4" Waterless Trap Seal
Fits 4" (DN100) drain outlets. ≥340 L/min flow capacity. 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 4-inch drains, 102 to 110 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 GD4
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.
ASSE 1072-2020 Performance Data
Independently tested by IAPMO R&T. These are lab-verified results from an accredited third-party testing laboratory.
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 | GD4 |
| Pipe Size | 4" (102-110 mm) / DN100 |
| Height | 51 mm |
| Housing Diameter (no gasket) | 88.39 mm (3.480"), bottom 93.47 mm (3.680") |
| Housing with Gasket | 108.56 mm (4.274") wide x 50.7 mm (1.996") |
| Housing Material | ABS Plastic |
| Valve Material | Silicone Rubber |
| Seal Material | Silicone Gasket |
| Flow Rate | ≥340.00 L/min |
| ASSE 1072 Opening Force | 32 grams |
| ASSE 1072 Cycle Life | >2,500 cycles |
| ASSE 1072 Evaporation Reduction | >96% |
| Pressure Resistance (DTI) | >400 Pa |
| WaterMark License | WM-022837 (DN100) |
| Patents | Multiple US & international patents |
Industries we serve.
Green Drain is installed across a wide range of facilities.
Certifications and compliance.
WaterMark Australia
WM-022837 (DN100)
ASSE 1072-2020
Tested to the Performance Requirements for Barrier-Type Trap Seal Protection DevicesIndustry performance standard, not a certification
NSF/ANSI 2
Food Equipment Certified
HACCP International
Food Safe Equipment & Materials endorsement (RG-04)Endorsement, not a certification
CE / ETA-18/0536
European Technical Assessment
SGS Aerosol-Retention Test
Retained over 99.9% of an aerosolized MS2 bacteriophage viral surrogateIndependent test report, not a certification
DTI Test Report
Independent test report (Rapport 957187)Test report, not a certification
cUPC (IAPMO R&T)
Certified, File No. 9301 (tested on GD-4)
Ready to protect your drains?
Drop-in install. No tools. Works from day one.