WELL. WELL Water Efficiency Labeling The new European label for water and energy-saving sanitary fittings.

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1 Water Efficiency Criteria Self closing valve Sensor valve WELL Water Efficiency Labeling The new European label for water and energy-saving sanitary fittings. WELL Manufacturer: Product category: Type: Model: Registration number: Schell GmbH & Co.KG Wash basin valve Time/sensor valve Celis E HD K WA Flow rate > 6,0 l/min 9,0 l/min Controlled flow rate 4,0 l/min 6,0 l/min Flow independent temperature setting limit / Cold water valve Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association

2 WELL. The new label of the European fittings sector. The global population is expected to exceed the 7 billion mark in The consequence: the demand for water for everyday life and personal hygiene will continue to rise as will that for agriculture and industrial processes. Saving resources: the challenge for the future. Even if there is no water shortage in some Central European countries, a shortage can no longer be ruled out here at certain times of year due to the climate changes. Higher heating costs are directly correlated to an increasing demand for water. For example, for the treatment and conveyance of drinking water 0.4 kw/m³ alone is needed. In addition, the CO 2 footprint is being permanently affected by the energy requirement for heating domestic water. The amount of energy needed to heat 1 m³ of hot water is approx. 34 kw. Facts that have given occasion to the European Commission making the efficiency of energy consumptionrelated products transparent to consumers throughout the sector within the context of the ecodesign strategy. WELL the decison-making aid for planners, architects, plumbers and consumers. Under the umbrella of EUnited, the European association of fittings manufacturers, a new classification system has been developed that provides planners, architects, plumbers and consumers with an evaluation system to refer to when assessing the water and energy consumption of sanitary fittings. SCHELL is a member of the European Association of Fittings Manufacturers 2

3 Domestic water consumption per household in 2008: 121 litres average values, relating to the water supply to households and small businesses Toilet flushing 33 l 12 % 27 % 36 % Baths/showers/ personal hygiene 43 l 6 % 6 % 4 % 9 % Doing the washing 15 l Small business share 11 l Cleaning, car maintenance and garden 7 l Washing up 7 l Eating and drinking 5 l Source: BDEW Bundesverband der Energie- und Wasserwirtschaft e. V., No compromises in quality. The basis of classification of each fitting is adherence to the applicable European standards. This is tested and certified by an independent accredited testing institute (EN ISO /ICE 17025) in the course of type testing. This ensures that only those materials are used that are totally hygienic and whose functional reliability has been verified in endurance testing. Better planning of efficient, public sanitary facilities. Independent investigations have discovered that approx. 80 % of building overheads have to be spent on operation and maintenance in its lifetime. This is where investments in water and energy-efficient fittings quickly pay off. In addition to service and maintenance costs, water consumption and energy costs play a significant role in this. This is why these days buildings are classified according to»green Building Standards«, like LEED* and DGNB. WELL can contribute to this. Drinking water hygiene and saving water are not a contradiction in terms. The top priority is maintaining drinking water hygiene. Lower water consumption in single fittings does not contradict this. Indeed it is more to do with preventing stagnant water collecting in a pipe system by using suitable pipe work and specifically arranging the fittings in accordnace with frequency of use. Adherence to flow rates is to be planned with pipe sizes complying with DIN 1988 (in future: EN ). In this context, sufficient insulation of the pipe systems are also called for so that the temperatures required by DIN 1988 (in future: EN ) and the DVGW working sheet W 551 (German association for gas and water) can be upheld. Fittings with high flow rates do not offer any advantages when there are long periods of non-use. If the way the building is used dictates longer periods of non-use, fittings with automatic anti-stagnation flush are to be provided. *LEED = Leadership in Enviromental and Economic Design DGNB = German Sustainable Building Council 3

4 How does WELL classification work? Here is an overview. The new WELL label will provide more transparency and clarity wherever drinking water is used for food preparation or personal hygiene. By means of the classification, the user will be able to establish what the energy and water consumption is for various fittings. The only exceptions are the bathtub fittings and those for connecting domestic appliances that do not directly affect the water consumption. These include fittings for washing machines or dishwashers, or those for watering the garden The following fittings can be classified: Wash basin and bidet fittings Shower fittings WC flush systems Urinal flush systems Kitchen fittings There are three different labels:»home«,»public«and»upgrade«. Sanitary fitting requirements for the home are different to those for public and commercial areas. While at home comfort and the individual experience of well-being are at the forefront in the bathroom, in public sanitary facilities the emphasis is on the efficient use of water and above all hygiene. To do justice to these differences within WELL, classification has been split into three labels:»home«for private households»public«for the public sector»upgrade«for accessories for universal use Examples for different evaluation criteria Volume Volume Time limit * control Evaluation criteria for draw-off taps in the»home«category Evaluation criteria for shower fittings in the»public«category Evaluation criteria for draw-off taps in the»upgrade«category 4

5 Manufacturer: Product category: Type: Model: Registration number: Mustermann Shower valve Single lever valve Muster DA Manufacturer: Product category: Type: Model: Registration number: Schell GmbH & Co.KG Wash basin valve Time/sensor valve Celis E HD K WA Manufacturer: Product category: Type: Model: Registration number: Mustermann Accessories wash basin valve Regulating angle valve Muster ZW Water Efficiency Criteria Water Efficiency Criteria Water Efficiency Criteria Flow rate > 9,0 l/min 12,0 l/min Controlled flow rate 4,5 l/min 9,0 l/min Flow independent temperature setting limit / Cold water valve Flow rate > 6,0 l/min 9,0 l/min Controlled flow rate 4,0 l/min 6,0 l/min Flow independent temperature setting limit / Cold water valve Flow rate > 6,0 l/min 9,0 l/min Controlled flow rate 4,0 l/min 6,0 l/min Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association Self closing valve Sensor valve Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association»Home«label»Public«label»Volume upgrade«label Efficiency increases with»upgrades«. Accessories for draw-off and shower fittings are also classified at WELL, provided that they help to increase water and energy efficiency when combined with other components. Depending on the area of application, these components are termed»upgrade Volume«(water volume) or»upgrade Therm«(energy) and are of particular interest for retrofitting and modernisation. Of course, it is user habits that ultimately affect actual water and energy consumption. However, the WELL label demonstrates which reductions can be made. Requirement-led criteria. Regardless of whether for»home«,»public«or»upgrade«, wash basin fittings or shower fittings depending on the area of application and requirement different evaluation criteria are taken into account in the WELL classification of a sanitary fitting. For example, this may be the flow rate, temperature or time. Separate evaluation criteria apply to WC and urinal flushing systems. How is the WELL label to be read? The design of the WELL label is geared towards the energy efficiency labels already familiar from the domestic appliances sector. The WELL label has a maximum of two stars for each evaluation criterion. Therefore, the total for»home«(two criteria: volume and temperature) is a maximum of four stars; for»public«(three criteria: volume, temperature and time) a maximum of six stars and for»upgrades«a maximum of two stars in each case. An arrow shows how many stars each product has achieved for each criterion.»a«for maximum efficiency. A coloured bar for each star shows at a glance how many stars would be possible. If a fitting achieves the maximum number of stars, the classification arrow (overall classification) will point to the»a«bar for maximum efficiency. 5

6 Draw-off taps.»home«category. In the private sphere, the potential savings for wash basin, kitchen and bidet taps exists purely in terms of the flow volume and water temperature. The period of use does not play a role in this case, as the convenience of having constantly available water for individual requirements is the key factor. Modern technology allows the convenience of hot water and drinking water hygiene to be well combined with great water and energy efficiency. The special charateristic in evaluating kitchen taps: here, the water is not only needed for washing hands, but also primarily for filling up containers and washing dishes. To account for these special requirements greater flow rates apply in this case compared to wash basin fittings. Volume The evaluation. A maximum of two stars are awarded for each evaluation criterion. This means a maximum of four stars for taps in the»home«segment. Which taps can get which evaluations? Designs Volume Single lever taps * / * / Two handle taps * / / Cold water taps * / / The WELL classification requirement of EUnited Valves (excerpt) Pressure-dependent, restrictive solution for wash basin* and kitchen fittings (1 star) The maximum flow rates are 9 l/min for wash basin fittings and 12 l/min for kitchen fittings. The minimum flow rates to be achieved are 6 l/min for wash basin fittings and 9 l/min for kitchen fittings. Potential solutions are the use of appropriate jet regulators, regulating angle valves, fittings with economy buttons (that need to be active in default mode) or cartridges with a water saving position, which has to be exceeded when there is increased demand for water Pressure-independent, restrictive solution for wash basin and kitchen fittings (2 stars); bidet fittings are treated as wash basin fittings. The max. flow rates are 6 l/min for wash basin fittings and 9 l/min for kitchen fittings. The minimum flow rates to be achieved are 4 l/min for wash basin fittings and 6 l/min for kitchen fittings setting irrespective of flow (1 Star) The energy efficiency of mixers is increased if the required temperatures are generally set within a shorter adjustment period irrespective of the flow. This is ensured by single lever taps and thermostatic taps for example. In the case of thermostic taps, the temperature is set on a scale. For single lever taps, the temperature is adjusted by moving the lever without increasing the flow output. In the case of self-closing or sensor fittings, this can be carried out using a mixer lever or by turning the control element. Comment: In contrast, the required discharge temperature for two handle fittings can only be achieved by additionally mixing cold or hot water 6

7 Evaluation criterion Realised by Evaluation Volume (flow) Pressure-dependent, restrictive solution > 9 l/min and 12 l/min Pressure-independent, volume-regulating solution 6 l/min and 9 l/min setting irrespective of flow limit and cold water valves Evaluation criterion Realised by Evaluation Volume (flow) Pressure-dependent, restrictive solution > 9 l/min and 12 l/min Pressure-independent, volume-regulating solution 6 l/min and 9 l/min setting irrespective of flow limit and cold water valves Total: max. 4 stars Total: max. 4 stars Classification overview of wash basin/bidet taps. Classification overview of kitchen taps. Example of a 4 star»home«wash basin tap Design: single lever tap Flow rate: 6 l/min with controlled jet regulator : adjustable hot water stop Example WELL label for a 4-star wash basin tap Note: the taps shown here are just examples. Classification is currently in progress. together. However, this means that the flow volume and energy consumption is increased as a result (no evaluation points) limiter (2 stars) These are all devices that can be used to limit the temperature. These include thermostatic fittings with hot water stops that can be bridged or have fixed settings, or single lever taps and other mixers with devices for limiting the hot water mixed in, such as manual devices for limiting the open angle of the operating control Cold water fittings (2 stars) Draw-off taps exclusively for operation with cold water are evaluated as fittings with a temperature limit device. If operated as intended, no energy is needed for heating water. The fitting is to be labelled clearly as a cold water tap; for example, by marking it blue or or applying a character or symbol. Draw-off taps for hot or pre-mixed water (handle is labelled red or has no marking) are not evaluated, as energy consumption cannot be influenced by the tap itself. 7

8 Draw-off taps.»public«category. In the case of draw-off taps in public sanitary facilities, user hygiene and water and energy efficiency are the key factors. As water and energy consumption are particularly dependent on the length of use that is, the period of time that the water is running the evaluation criterion of time is an additional factor to flow volume and temperature in the»public«segment. The evaluation. A maximum of two stars are awarded for each evaluation criterion. This means a maximum of six stars for taps in the»public«segment. Which taps can get which evaluations? Menge➀ Volume Zeit Time Temperatur➀ Designs Volume Time Single lever taps * / * / / Self-closing taps * / * / * / Electronic sensor taps * / * / / Cold water taps * / / / Two handle taps * / / / The WELL classification requirement of EUnited Valves (excerpt) Time-controlled self-closing fittings with or without sensor activation (1 star) Self-closing fittings that have to close on their own after the activation and expiration of a preset or adjustable cycle. When delivered, the cycle should be set to 10 s Sensor fittings with utilisation-dependent on/ off function (2 stars) The water output for a sensor fitting has to to stop when the user leaves the sensor zone or the (adjustable) maximum cycle limit in the fitting is exceeded. 8

9 Evaluation criterion Realised by Evaluation Volume (flow) Pressure-dependent, restrictive solution > 9 l/min and 12 l/min Pressure-independent, volume-regulating solution 6 l/min and 9 l/min Classification overview of»public«wash basin taps. Time Time-controlled self-closing taps with or without sensor activation Sensor taps with utilisation-dependent on/off function setting irrespective of flow limit and cold water valves Total: max. 6 stars Example of a 6 star»public«wash basin tap Volume: 6 l/min with controlled jet regulator Time: Sensor with utilisation-dependent on/off function : cold water valve Manufacturer: Product category: Type: Model: Registration number: Schell GmbH & Co.KG Wash basin valve Time/sensor valve Celis E HD K WA Example WELL label for a 6-star wash basin tap Water Efficiency Criteria Flow rate > 6,0 l/min 9,0 l/min Controlled flow rate 4,0 l/min 6,0 l/min Flow independent temperature setting limit / Cold water valve Self closing valve Sensor valve Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association Hygiene information: To maintain drinking water hygiene ensure that water within the pipes is exchanged regularly. When longer periods of non-use are expected (e. g. school holidays) the use of taps with anti-stagnation flush activation are recommended, if no other way of regularly changing the water can be provided. 9

10 Shower fittings.»home«category. With the right shower taps, water and energy efficiency can also be increased at home without having to compromise on convenience and comfort. Every user is free to decide to increase the flow volume to above the classification limit depending on their own personal requirements. However, when the valve is reopened the economy setting must be automatically reset (default position). Leaving the economy range, however, needs to be a deliberate act. The evaluation. A maximum of two stars are awarded for each evaluation criterion. This means a maximum of four stars for taps in the»home«segment. Which taps can get which evaluations? Volume Designs Volume Sensor taps with on/off function * / * / Cold water taps * / / Taps with temperature setting dependent on flow volume * / * / Taps with temperature limit device * / * / The WELL classification requirement of EUnited Valves (excerpt) Increasing the flow rate above the water-saving level (e.g. by turning on additional showers) is permitted, if the user has to actively intervene; i.e. default status = water-saving position. In the case of bath and shower fittings, only the shower function can be evaluated. 10 Evaluation criterion: Volume (flow) (max. 2 stars) In contrast to sanitary draw-off taps, the minimum flow rate of 6 l/min und maximum flow rate of 12 l/min in terms of health and convenience is to be achieved for shower fittings, hand and head shower units or shower hoses, and for complete sets combining these components. As upgrade components, shower heads or hoses have to come within the flow rate limits given above in order to be classified Pressure-dependent, restrictive solutions (1 star) The max. flow pressure is 12 l/min at 2 bar flow pressure; A minimum flow rate of 9 l/min at 3 bar is to be achieved Pressure-independent, volume controlled solutions (2 stars) The max. flow pressure is 9.0 l/min at 3 bar flow pressure; for a minimum flow rate to be achieved of 4.5 l/min.

11 Evaluation criterion Realised by Evaluation Volume (flow) Pressure-dependent, restrictive solution > 9 l/min and 12 l/min Pressure-independent, volume-regulating solution 4.5 l/min and 9 l/min Classification overview of»home«shower taps. setting irrespective of flow 1 limit and cold water valves 2 Total: max. 4 stars 1 Those fittings with which the temperature is set irrespective of flow include single lever taps, thermostic taps and fittings with mixing levers or rotary knobs. 2 Fittings with temperature limitation are those with hot water stops (fixed or adjustable). Example of a 2 star»home«shower tap Volume: 18 l/min : limited by hot water stop Manufacturer: Product category: Type: Model: Registration number: Mustermann Shower valve Single lever valve Muster DA Example WELL label for a 2-star shower tap Water Efficiency Criteria Flow rate > 9,0 l/min 12,0 l/min Controlled flow rate 4,5 l/min 9,0 l/min Flow independent temperature setting limit / Cold water valve Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association Note: the taps shown here are just examples. Classification is currently in progress. More WELL stars? There are 2 more stars for using a shower head with controlled flow 9l/min. More information on ways of upgrading to achieve an even more efficient installation can be found on pages Manufacturer: Mustermann Product category: Accessories shower valve Type: limiter Model: Muster Registration number: ZD Water Efficiency Criteria control element limiter Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association 11

12 Water and energy reduction is top priority for shower taps in public or commercial sanitary facilities. Therefore, the maximum potential savings should be exploited in this case by using an additional timecontrolled flow limit device. The evaluation. A maximum of two stars are awarded for each evaluation criterion. This means a maximum of six stars for taps in the»public«segment. Volume Time Which taps can get which evaluations? Designs Volume Time-controlled self-closing taps * / * / Sensor taps with on/off function * / * / Cold water taps Taps with temperature setting dependent on flow volume * / / * / * / Taps with temperature limit device * / * / The WELL classification requirement of EUnited Valves (excerpt) Time-controlled self-closing fittings with or without sensor activation (1 star) Self-closing fittings that have to close on their own after the activation and expiration of a preset or adjustable cycle. When delivered, the cycle should be set to <- 20 s Sensor fittings with utilisation-dependent on/ off function (2 stars) The water output for a sensor fitting has to to stop when the user leaves the sensor zone or the (adjustable) maximum cycle limit in the fitting is exceeded. 12

13 Evaluation criterion Realised by Evaluation Volume (flow) Pressure-dependent, restrictive solution > 9 l/min and 12 l/min Pressure-independent, volume-regulating solution 4.5 l/min and 9 l/min Classification overview of»public«shower taps. Time Time-controlled self-closing fittings with or without sensor activation Sensor fittings with utilisation-dependent on/ off function setting irrespective of flow limit and cold water valves Total: max. 6 stars Example of a 4 star»public«shower tap Volume: 18 l/min Time: Sensor with utilisation-dependent on/ off function : Thermostat with temperature limit Manufacturer: Product category: Type: Model: Registration number: Mustermann Shower valve Time/sensor valve Muster DA Example WELL label for a 4-star shower tap Water Efficiency Criteria Flow rate > 9,0 l/min 12,0 l/min Controlled flow rate 4,5 l/min 9,0 l/min Flow independent temperature setting limit / Cold water valve Self closing valve Sensor valve Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association Note: the taps shown here are just examples. Classification is currently in progress. By upgrading a shower head ( 9 l/min) 2 more stars can be achieved. + = 4 star shower tap 2 star shower head 6 star shower solution 13

14 Upgrade option.»volume«category. If a sanitary system is to be put together using several components there is the option of obtaining more WELL stars by upgrading. This is a necessary part of a coherent classification system, which also takes into account the option of retrofitting existing systems. Furthermore, a WELL upgrade is also an important tool for bringing existing systems up to a higher level of efficiency. The following principle applies: conformity characteristics in one category can only be evaluated once. Example: a»home«wash basin tap with a 1 star flow rate classification and a 1 star temperature classification (C) can be combined with a regulating angle valve with a 2 star classification. The system will improve to 3 stars (B classification) and not to 4. The volume* (flow) category is limited to components in sanitary draw-off taps that are not part of a delivery unit. This means that if a shower tap is supplied without a shower head, this can be combined with a rainshower shower head of 18 l/min or a sports shower head of just 9 l/min. There are numerous components that can be used to obtain stars in the upgrade of a sanitary system. Examples for wash basin fittings: flow regulators, regulating angle valves, and jet regulators, etc.; examples for shower fittings: shower heads, hand-held showers, shower hoses, and flow regulators, etc. * At WELL the term volume is used as a uniform term for sanitary draw-off taps, even though the technically correct term here is flow (rate in l/min). 14

15 Pressure-dependent flow regulation Pressure-independent flow regulation Classification criteria of»volume«upgrade. Valuation 1. Volume/flow Valuation 2. Volume/flow Pressure-dependent flow regulation Wash basin > 6 l/min and 9 l/min Kitchen > 9 l/min and 12 l/min Shower > 9 l/min and 12 l/min + Upgrade volume Flow regulation irrespective of pressure Wash basin 4 l/min and 6 l/min Kitchen 6 l/min and 9 l/min Shower 4.5 l/min and 90 l/min Examples of a 2 star»volume«upgrade SCHELL regulating angle valve with integral COMFORT ECO flow regulator (Pressure-independent control) Manufacturer: Product category: Type: Model: Registration number: Schell GmbH & Co.KG Accessories wash basin valve Regulating angle valve COMFORT ECO 4l/min ZW WELL label for the 2 star»volume«upgrade Water Efficiency Criteria SCHELL regulating angle valve COMFORT ECO Flow rate > 6,0 l/min 9,0 l/min Controlled flow rate 4,0 l/min 6,0 l/min Flow regulator Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association You will also find examples of a sanitary system upgrade on page 10. By upgrading a flow regulator ( 6 l/min) 2 more stars can be achieved. + = 1 star single lever tap 12 l/min (temperature) 2 star flow regulator 3 star wash basin solution 15

16 Upgrade option.»therm«category. If the discharge temperature of a tap is limited, this will have a direct effect on energy consumption. This therefore directly concerns the requirements of the ErP directive 1 of the EU, which demands a better information policy for energy consumption-related products. This does not only include measures that provide set limits, but also those that can be exceeded consciously through user intervention. In the case of thermostatic fittings, these are hot water stops that can be set or consciously exceeded by the user 2.»Public«wash basin tap Flow Tap with a controlled jet regulator of 6 l/min 2 stars Tap with temperature setting irrespective of flow (mixing lever) Combination example. A real example illustrates how a»therm«upgrade of a fitting can lead to a considerably better classification. 1 star 3 Time Tap with user-controlled sensor 2 stars + Upgrade»Therm«Wash basin thermostat in front of wash basin tap with temperature limit device 2 stars Classification of the entire system: 6 stars 1 ErP: Energy Related Products 2 Note: Only fixed temperature limits should be used in child care facilities or care homes to prevent scalding. 3 Conformity features in one category cannot be added together. 16

17 setting irrespective of flow limit Classification criteria of a»therm«upgrade. Valuation 2. Valuation 2. setting irrespective of flow + Upgrade therm limit Thermostatic valve with hot water stop Examples of a 2 star»therm«upgrade SCHELL angle valve thermostat with hot water stop Manufacturer: Product category: Type: Model: Registration number: Mustermann Accessories shower valve limiter Muster ZD WELL label for the 2 star»therm«upgrade + = 5 star wash basin tap 2 star angle valve thermostat 6 star wash basin solution Water Efficiency Criteria control element limiter Information about use and installation: online.eu. A Label of EUnited Valves European Valve Manufacturers Association 17

18 WC flush systems.»home«category. Approx. 27 % of water consumption in an average household is caused by flushing toilets. By taking intelligent measures, large volume reductions can quickly be made and without affecting any functions. Investigations have shown that in a 4 person household over 50 % water can be saved by exchanging a 9 litre cistern for a 6 litre cistern with short flush economy button. Important to know: it is always the cistern system unit plus relevant control button that is classified and corresponding WELL points awarded. Many cisterns can be equipped with single flush (no classification points), with control buttons with start/stop function (1 star) or with dual flush technology (2 stars). The benefit of the dual flush technology is that in economy mode the exact amount required is flushed. Flush volume Example potential saving Water consumption 9 litre cistern: 20 x 9 l = 180 l/day Water consumption 6 litre cistern with economy button: 6 x 6 l = 36 l/day 14 x 3 l = 42 l/day Water saved: 102 l/day Program The WELL classification requirement of EUnited Valves (excerpt) Flushing volume (fixed or adjustable ) 6 l (1 star) The flushing devices need to be suitable for WC bowls type 6 conforming to EN 997 with rated flush volumes of 6 l Flushing volume (fixed or adjustable ) 5 l or 4 l (2 stars) The flushing devices need to be suitable for WC bowls type 5 and type 4 conforming to EN 997 with rated flush volumes of 5 l or 4 l. 5.2 Evaluation criterion: Flush program (max. 2 stars) Undefined flush with minimal volumes (start/stop button; short flush push-button) (1 star) Defined minimal volume flush (dual flush; economy button) (2 stars) 18

19 Evaluation criterion Realised by Evaluation Classification criteria. Volume/flushing volume Flush program Flushing volume (fixed or adjustable ) 6 l Flushing volume (fixed or adjustable ) 5 l or 4 l Undefined flush with minimal volumes Defined minimal volume flush Total: max. 4 stars Example of a 3 star»home«wc flush system Volume/flushing volumes: Cistern 6 l flush Flush program: Dual flush Note: the fitting shown is only an example. Classification is currently in progress. Practical tip: When using water-saving WC flush systems the functionality of the ceramic unit is to be taken into account. Furthermore, a professional should check whether the waste water system is suitable for a flush volume of 5 or 4 litres. 19

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