Technical Specifications
Complete dimensions, flow rates, pressure ratings, materials, and certification data for all 8 Green Drain waterless trap seal models.
Specified by architects and engineers. Available in every major tool.
Quick overview.
All Green Drain models use the same patented silicone valve design. They differ in pipe size, flow capacity, and available certifications. Every model is a drop-in install with no tools required.
| Model | Pipe Size | DN | Height | Flow Rate (C) | Flow Rate (U) | Key Application |
|---|---|---|---|---|---|---|
| GD125 | 1.25" | DN32 | 26 mm | 7.27 L/min | 29.22 L/min | Fixture drains, sinks, bidets |
| GD15 | 1.5" | DN40 | 28 mm | 24.21 L/min | 51.55 L/min | Showers, laundry, residential |
| GD2 | 2" | DN50 | 33 mm | 35.25 L/min | 82.50 L/min | Residential and light commercial |
| GD3 | 3" | DN80 | 51 mm | 40.65 L/min | 105.70 L/min | Commercial floor drains |
| GD35 | 3.5" | DN90 | 51 mm | 121.60 L/min | 323.17 L/min | Food service, commercial kitchens |
| GD4 | 4" | DN100 | 51 mm | 276.3 L/min | ≥340 L/min | Commercial, institutional (most common) |
| GD5 | 5" | DN125 | 42 mm | 270 L/min | 391 L/min | Industrial floor drains |
| GD6 | 6" | DN150 | 51 mm | 535 L/min | ≥550 L/min | Industrial, high-capacity drains |
Level C = controlled flow rate per ASSE 1072-2020. Level U = unrestricted flow rate. All values from IAPMO testing (File No. 9301).
Dimensions.
All measurements from IAPMO-certified testing. Housing diameter is measured without the compression gasket. Overall dimensions include the silicone gasket for fit verification.
| Model | Pipe Size | Height | Housing Dia. (no gasket) | Overall Width (with gasket) | Overall Height (with gasket) |
|---|---|---|---|---|---|
| GD125 | 1.25" / DN32 | 26 mm | 30.27 mm (1.192") | 40.22 mm (1.583") | 27.45 mm (1.081") |
| GD15 | 1.5" / DN40 | 28 mm | 36.46 mm (1.435") | 48.77 mm (1.920") | 30.18 mm (1.188") |
| GD2 | 2" / DN50 | 33 mm | 42.66 mm (1.680") | 60.55 mm (2.384") | 32.7 mm (1.287") |
| GD3 | 3" / DN80 | 51 mm | 61.49 mm (2.421") | 82.76 mm (3.258") | 50.5 mm (1.988") |
| GD35 | 3.5" / DN90 | 51 mm | 78.75 mm (3.100") | 97.46 mm (3.837") | 50.82 mm (2.001") |
| GD4 | 4" / DN100 | 51 mm | 88.39 mm (3.480") | 108.56 mm (3.274") | 50.7 mm (1.996") |
| GD5 | 5" / DN125 | 42 mm | 96.5 mm (3.878") | 134.80 mm (5.310") | 42.21 mm (1.662") |
| GD6 | 6" / DN150 | 51 mm | 150.2 mm (5.400") | 159 mm (6.260") | 50.8 mm (1.462") |
All dimensions are nominal. Silicone gasket compresses during insertion for a watertight seal. Measure the internal diameter of your drain outlet, not the pipe size, for proper fit.
Flow rates.
Flow rates tested under ASSE 1072-2020 (Level C and Level U) by IAPMO, and independently verified by DTI (Danish Technological Institute) under EAD 180020-00-0704. DTI values represent real-world drainage capacity.
| Model | ASSE Level C | ASSE Level U | DTI Flow Capacity | GPM Equivalent |
|---|---|---|---|---|
| GD125 | 7.27 L/min | 29.22 L/min | - | 1.9 GPM (C) |
| GD15 | 24.21 L/min | 51.55 L/min | - | 6.4 GPM (C) |
| GD2 | 35.25 L/min | 82.50 L/min | 45.4 L/min (0.85 L/s) | 9.3 GPM (C) |
| GD3 | 40.65 L/min | 105.70 L/min | 128.7 L/min (1.5 L/s) | 10.7 GPM (C) |
| GD35 | 121.60 L/min | 323.17 L/min | 193.0 L/min (2.3 L/s) | 32.1 GPM (C) |
| GD4 | 276.3 L/min | ≥340 L/min | 276.3 L/min (1.4 L/s) | 73.0 GPM (C) |
| GD5 | 270 L/min | 391 L/min | 276.3 L/min (4.0 L/s) | 71.3 GPM (C) |
| GD6 | 535 L/min | ≥550 L/min | - | 141.3 GPM (C) |
Level C = controlled flow. Level U = unrestricted/surge flow. GPM values calculated from Level C data. DTI data from Rapport 957187 and Test Report 226049.
Pressure and sealing performance.
Pressure resistance tested by DTI under EAD 180020-00-0704 and EN 1253-1. Odour tightness confirmed across all models per CE/ETA-18/0536. These values determine suitability for specific building and plumbing code requirements.
| Model | Pressure Resistance (DTI) | Odour Tightness (CE) |
|---|---|---|
| GD125 | >400 Pa | 200 Pa |
| GD15 | >400 Pa | 200 Pa |
| GD2 | 661 Pa | 200 Pa |
| GD3 | 660 Pa | 200 Pa |
| GD35 | 502 Pa | 200 Pa |
| GD4 | >400 Pa | 200 Pa |
| GD5 | 610 Pa | 200 Pa |
| GD6 | >400 Pa | 200 Pa |
Pressure resistance values are model-specific where DTI testing produced exact measurements. Models without individual DTI data use the conservative code-compliant baseline of >400 Pa, aligned with GD4 EAD compliance threshold. Odour tightness of 200 Pa (requirement: 180 Pa) applies to all models per CE/ETA-18/0536.
ASSE 1072-2020 performance (all models).
ASSE 1072-2020 is the North American performance standard for barrier-type floor drain trap seal devices. Testing was performed on the GD4, the most demanding commercial size. All Green Drain models share the same patented silicone membrane design, so performance is equivalent or better under lower flow conditions. These results apply across the full product line.
| Performance Metric | Result | ASSE 1072 Requirement |
|---|---|---|
| Opening Force | 32 grams | ≤113.4 grams (4 oz) |
| Cycle Life | >2,500 cycles | Pass durability test |
| Evaporation Reduction | >96% | Reduce evaporation vs. open control |
| Flow Capacity (GD4) | 276 L/min | Meet rated flow |
Tested by IAPMO R&T on the GD4 (4", DN100) as the representative model. ASSE 1072 testing is standardized, and the GD4 is the most demanding commercial size, making it the benchmark for opening sensitivity, durability, and evaporation control. Smaller models use the same silicone membrane design and perform equivalently or better under lower flow conditions.
Materials and construction.
All Green Drain models share the same material construction. The silicone valve membrane has been independently tested by CRT Laboratories for tear strength, chemical resistance, UV exposure, and temperature performance.
| Component | Material | Properties |
|---|---|---|
| Housing | ABS Plastic | Impact-resistant, dimensionally stable, UV-resistant |
| Valve Membrane | Silicone Rubber | Medical-grade, 93x tear strength over minimum, rated -40°F to 212°F (-40°C to 100°C) |
| Seal Gasket | Silicone Gasket | Compression seal for watertight fit, chemical-resistant |
Certification matrix.
Green Drain holds certifications from 7 independent testing laboratories across North America, Europe, and Australia. Not all certifications apply to every model. This matrix shows exactly which models are covered.
| Certification | GD125 | GD15 | GD2 | GD3 | GD35 | GD4 | GD5 | GD6 |
|---|---|---|---|---|---|---|---|---|
| cUPC / ASSE 1072 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| CE / ETA-18/0536 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| NSF/ANSI 2 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| HACCP International | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| WaterMark | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | - | - |
| Proposition 65 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| SGS Pathogen Test | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| DTI Testing | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
All certification names link to their dedicated detail pages with downloadable documents. For project-specific certification questions, contact our engineering team.
Match to your drain outlet.
Measure the drain outlet itself (not the pipe leading to it) and match the size to the right Green Drain model. Sizes are shown in DN (metric) and imperial so you can spec the correct fit anywhere in the world.
DN32 – DN50
1.25" – 2"
DN80 – DN90
3" – 3.5"
DN100
4"
DN125 – DN150
5" – 6"
Installing in a region with non-standard drain sizes? Talk to our engineering team – we have size variants for APAC and other markets.
Green Drain Spec Pack
Complete specification package for architects, engineers, and facility managers. Everything you need for your project submittal.
- All 8 model spec sheets with dimensions
- ASSE 1072-2020 test data
- Certification summaries (cUPC, CE, NSF, HACCP)
- Installation instructions
- CSI 3-part specification language
Revit Families
Drop Green Drain directly into your Revit project. One zip contains the full product family in both Metric and Imperial units, ready to place in your model.
- All 11 Green Drain SKUs (GD125 through GD6, including EG variants)
- Metric and Imperial .rfa files
- Accurate geometry for clash detection and scheduling
- Ready to place, tag, and schedule
Need help selecting the right model?
Our engineering team can help you size Green Drain for your specific application. Send us your drain dimensions and we'll recommend the right fit.