Enduce E1 is tested according to the standard for floor drains SS-EN 1253, watertight built-in cabinets SP-method 5676, protection devices to prevent backflow SS-EN 1717, valve testing NKB 13, and composition analysis of brass according to SP 5309. SP 5309.
Type tests performed by RISE show that Enduce E1 meets the requirements of the Swedish National Board of Housing, Building and Planning's building regulations, BFS 2011:6 with amendments up to and including BFS 2020:4 - Chapter 6 Hygiene, health and environment. Certification work is ongoing. Testing is completed with approved results:
- Waterproofing layers BBR 6:5331, 6:9531
- Concealed surfaces in rooms or parts of buildings BBR 6:5334, 6:9532
- Waste water installations BBR 6:641
- Design BBR 6:644
- Installations for potable water BBR 6:62
- Tap water BBR 6:623
- Backflow BBR 6:624
- Design BBR 6:625.
In addition to the verification of building, environmental, hygiene and health tests based on established standards as above - measurements performed by RISE also show that the energy recovery rate for energy incoming to the floor drain is 71-75 %, and that the cooling rate of the heat recovery system is <3 h, which ensures a good legionella safety. All brass in contact with tap water is made of dezincification-resistant and lead-free alloy CW724R.
The development of Enduce E1 started already in 2008 with basic technical development until 2013. The first prototype was installed in households in 2015. The development into a finished product was intensified after 2020 and, with support from, among others, the Swedish Energy Agency, a series of verifications were carried out with demanding customers during 2022-2023. During this period, both independent tests and several installations were carried out in various operating environments, such as corridor housing, apartments, villas, commercial premises and prefabricated bathroom modules. The experience gained from the verification project has led to the refinement of the technology, the harmonization with the applicable industry rules, the development of the production, and the completion of the type approval tests in summer 2024. The design of the product has also been developed during the period to be easy to use and aesthetically pleasing.
To date, over 15 000 showers have been taken with the technology. The standardized type tests confirm that the technology is safe as a construction product and meets all relevant hygiene, environmental, water safety and durability requirements. Experience from actual operation shows that the floor drain retains its function over time provided that the floor drain is cleaned typically every 30 to 120 showers, depending on showering habits.
In-depth information on type testing and approval
Waterproofing layers BBR 6:5331, 6:9531:
Joints, connections, fixings and penetrations in waterproof layers are watertight and meet the requirements for temperature cycling of floor drains according to EN 1253-1 and requirements according to SP method 5676 and NT VVS 129 for junction boxes and penetrations. The floor drain is approved for installation closer than 200 mm to the wall and meets the requirements according to EAD 030352-00-0503 annex A when tested against waterproofing systems (more info about waterproofing connection can be read in a separate article here).
Concealed surfaces in rooms or parts of buildings BBR 6:5334, 6:9532
The floor drain has an outlet from the junction box so that leaking water is quickly visible and the product meets the applicable requirements of SP method 5676 and NT VVS 129.
The product has a function that ensures detection of leaks in the tap water installation throughout the product's lifetime, either via a traditional gossip tube, or via type-approved sensor-based leakage indication according to the upcoming BBR from 2025-07-01.
Wastewater installations BBR 6:641. The product meets the requirements for floor drains according to EN 1253-1
Overall, the floor drain has properties that meet the stringent requirements of EN 1253-1 with regard to flow, cleanability, and properties that minimize the risk of blowing through, drying out and spreading odors from the floor drain.
Design BBR 6:644
The sewer installation has been designed and materials selected for resistance to external and internal mechanical, chemical and microbial processes.
The product meets the design requirements for floor drains according to EN 1253-1.
Installations for potable water BBR 6:62
The tap water installation is made of materials that prevent unhealthy concentrations of harmful substances from being released into the tap water. The installation does not emit odors or tastes into the tap water. The components in contact with the tap water meet the hygiene requirements of CR 068.
Tap water BBR 6:623
Properly tempered water with sufficient flow rate (0.2 l/s) is obtained without troublesome waiting time (time to tempered temperature is not affected by Enduce E1, and the impact on the flow size at the installation of Enduce E1 is negligible).
Backflow BBR 6:624
The tap water installation is designed to prevent the backflow of contaminated water and other liquids as required by EN 1717.
- Domestic cold water connection: Non-controllable check valve (EB)
- Domestic hot water connection: Non-controllable check valve (EB)
The backflow preventer for the cold DHW case consists of a non-controllable non-return valve and partitions between the grey water and DHW made of pressurized and tightness controlled acid-proof steel (AISI 316). For the DHW case, the backflow preventer between the grey water and DHW normally consists of a non-return valve in series with a type-tested ball valve and an air gap.
Design BBR 6:625
The design and material of the domestic hot water installation is such that it has sufficient resistance to the external and internal mechanical, chemical and microbial processes. Components for the domestic hot water installation are dezincification-resistant and meet the requirements for type approval via functional testing and pressure testing at 16 bar.
In addition to the verification of building, environmental, hygiene and health tests based on established standards as above - measurements performed by RISE also show that the energy recovery rate for the energy incoming to the floor drain is 71-75 %, and that the cooling rate of the heat recovery system is <3 h, which ensures good legionella safety.
In addition to the requirements of BBR 6:62, all brass in contact with the tap water is made of dezincification-resistant and lead-free alloy CW724R.
The article was updated on 2024-10-01.
