Teknologisk Institut Rapport 957187
Independent laboratory testing by the Danish Technological Institute covering pressure resistance, water flow capacity, thermal cycling, self-cleaning ability, and extraction force for five Green Drain models. All requirements met per DS/EN 1253-1.
The Danish Technological Institute (Teknologisk Institut) is Denmark's premier independent testing laboratory for building products. Report 957187 was produced by DTI's Pipe Centre in Taastrup, Denmark, under the direction of Centre Manager Ulrik Hindsberger. Testing was performed in two phases: September 2016 and May 2018, with the final report issued December 9, 2020.
This report was produced to support both the European Technical Assessment (ETA-18/0536) and the Danish VA approval pathway (PG 2.4330-01). The test design is based on DS/EN 1253-1, the European standard for gullies for buildings, adapted because Green Drain is a trap seal protection device rather than a traditional water trap.
Five models were tested in this report: GD2 (DN50), GD3 (DN80), GD35 (DN90), GD4 (DN100), and GD5 (DN125). The later 2024 DTI report (No. 226049) covers GD1.25, GD1.5, GD2, GD4, and GD6, with GD2 and GD4 appearing in both reports for cross-validation. Together, the two reports provide DTI test data across all 8 Green Drain models.
All testing followed DS/EN 1253-1 protocols adapted for floor drain trap seal protection devices. Testing was referenced against Danish VA PG 2.4330-01 and Danish Standard DS 432 (4th edition, section 4.8) for pressure and vacuum performance requirements.
Each model was installed in its test gully and subjected to increasing positive pressure from the sewer side. Per DS 432, traps must handle both 400 Pa pressure and vacuum. All five models exceeded 400 Pa: GD2 reached 661 Pa, GD3 reached 660 Pa, GD35 reached 502 Pa, GD4 exceeded 400 Pa, and GD5 reached 610 Pa. Under negative pressure (suction from the drain side), the valve opened at less than 20 Pa, confirming the one-way pressure design.
Flow rates were measured in the horizontal position after temperature cycling (100 hours for the GD2 model). Results: GD2 at 0.85 L/s (requirement: 0.8 L/s), GD3 at 1.5 L/s (requirement: 0.8 L/s), GD35 at 2.3 L/s (requirement: 0.8 to 1.4 L/s), GD4 at 1.4 L/s (requirement: 0.8 to 1.4 L/s), and GD5 at 4.0 L/s (requirement: 2.8 to 4.0 L/s). All models met EN 1253-1 requirements.
The GD2 model was subjected to 100 hours of temperature cycling to simulate years of exposure to alternating hot and cold water. After cycling, the self-cleaning test confirmed that no debris (bullets) were retained in the valve. The result was rated satisfactory, confirming that the silicone membrane returns to its original shape and does not trap particles after extended thermal stress.
All five models were tested in two gully types: polypropylene (PP) and stainless steel. In every combination, the extraction force exceeded 5 kN (approximately 500 kg). This demonstrates that the friction fit between the silicone membrane and the drain wall holds the device securely in place. The report recommends a fastening device to prevent upward displacement if the product moves.
Testing confirmed that the valve opens under small negative pressure (suction) from the drain installation and opens completely when larger deposits pass through. This validates the core design principle: the device blocks against positive pressure from the sewer side while allowing normal drainage flow with minimal resistance.
Projects across Europe and Scandinavia reference DTI testing data when specifying waterless trap seal protection devices. This report is relevant to healthcare facilities requiring verified pressure resistance and flow data, commercial kitchens where thermal cycling performance matters, industrial facilities needing high pull-out resistance under heavy flow, hotels and commercial buildings across the EU, and any project where EN 1253-1 compliance is part of the specification.
Testing conducted at DTI Pipe Centre, Taastrup, Denmark. All five models met or exceeded every performance requirement.
Rapport 957187 provides performance data for models that are not covered in any other DTI report. It is an essential piece of the compliance picture for European and Danish market access.
This report supports the European Technical Assessment (ETA-18/0536) and is directly referenced in the Danish VA approval pathway (PG 2.4330-01). It provides the test evidence needed for CE marking of the GD2, GD3, GD35, GD4, and GD5 models across all EU and EEA member states.
For project specifications, this report is the only DTI source for GD3, GD35, and GD5 test data. Engineers specifying these models for European projects need this report for their submittal packages. It provides pressure ratings, flow capacities (in L/s per EN 1253-1), and extraction force data that feed directly into specification language.
The Danish Technological Institute is an independent laboratory with no commercial interest in the test outcome. Testing in both PP and stainless steel gullies demonstrates material-agnostic performance. And because both GD2 and GD4 appear in this report and the later DTI Report 226049, the two reports cross-validate each other, confirming consistent manufacturing quality over an eight-year period.
The complete test report from the Danish Technological Institute Pipe Centre, dated December 9, 2020. Covers vacuum and pressure resistance, water flow rates per EN 1253-1, temperature cycling, self-cleaning ability, and extraction force data for models GD2, GD3, GD35, GD4, and GD5.
Rapport 957187 is a test report from the Danish Technological Institute (DTI, known in Danish as Teknologisk Institut). It documents performance testing of five Green Drain models (GD2, GD3, GD35, GD4, GD5) based on DS/EN 1253-1, adapted for floor drain trap seal protection devices. Testing was performed in September 2016 and May 2018, with the report finalized in December 2020.
Testing followed DS/EN 1253-1, the European standard for gullies for buildings, adapted for use with floor drain trap seal protection devices. The report also references Danish VA PG 2.4330-01 and Danish Standard DS 432 (4th edition, section 4.8) for pressure and vacuum requirements.
Report 957187 covers models GD2, GD3, GD35, GD4, and GD5, while Report 226049 (from 2024) covers GD1.25, GD1.5, GD2, GD4, and GD6. Together, the two reports provide DTI test coverage for all 8 standard Green Drain models. Both reports include GD2 and GD4, providing cross-validation between the two test periods.
All five models tested required more than 5 kN (approximately 500 kg or 1,100 lbs) of force to extract from both polypropylene (PP) and stainless steel gullies. This demonstrates that Green Drain remains securely seated in the drain under normal operating conditions, including water flow and pressure fluctuations.
European drain installations use gullies (drain bodies) made from different materials. Polypropylene (PP) and stainless steel are the two most common types. Testing in both materials confirms that Green Drain performs consistently regardless of the installed gully material, which is important for specifiers and installers working across different building types.
Download the full DTI report above, or contact our engineering team for submittals, specification language, or EN 1253-1 compliance documentation for European projects.