NEN EN 997 : 2012 + A1 2015

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Functional requirements and test methods for class 1 products
  5.1 Depth of water seal
  5.2 Flushing requirements
       5.2.1 General
       5.2.2 Wash of bowl
       5.2.3 Flushing of toilet paper
       5.2.4 Flushing of fifty small plastic balls
       5.2.5 Over-splashing
       5.2.6 After-flush volume
  5.3 Water absorption
  5.4 Static load
  5.5 Leak tightness
  5.6 Valve reliability
  5.7 Durability of class 1 products
  5.8 Test methods
       5.8.1 Depth of water seal
       5.8.2 Flushing tests
       5.8.3 Determination of water absorption
       5.8.4 Load test
       5.8.5 Leak tightness
       5.8.6 Valve reliability
  5.9 Types of WC pans
       5.9.1 Nominal flush volume
       5.9.2 Flushing devices
6 Functional requirements and test methods for class 2 products
  6.1 Inlet valve
  6.2 Backflow prevention
  6.3 Marking of flushing cistern
  6.4 Warning pipe and overflow provision
  6.5 Flush Volume
       6.5.1 Full flush
       6.5.2 Reduced flush
  6.6 Flush rate
  6.7 Physical endurance and leakage of flushing device (valve
       reliability and water/leak tightness)
  6.8 Chemical endurance of flushing device (water/leak tightness)
  6.9 Solids discharge and after-flush volume for maximum flush
  6.10 Paper discharge for reduced-flush volume
  6.11 Liquid contaminant dye retention
  6.12 Wash of bowl
  6.13 Depth of water seal
  6.14 Static load of class 2 products
  6.15 Water absorption
  6.16 Durability of class 2 products
  6.17 Test methods
       6.17.1 Inlet valve tests
       6.17.2 Warning pipe and overflow provisions
       6.17.3 Flush volume and water trap seal tests
       6.17.4 Flush rate test
       6.17.5 Physical endurance and leakage test of
               flushing device
       6.17.6 Chemical endurance test of flushing device
       6.17.7 Solids discharge and after-flush volume for
               maximum flush volume test
       6.17.8 Paper discharge for reduced-flush volume test
       6.17.9 Liquid contaminant dye retention test
       6.17.10 Wash of bowl
       6.17.11 Summary of requirements for compatibility
               testing of class 2 products
7 Dangerous substances
8 Marking
9 Evaluation of conformity
  9.1 General
  9.2 Type testing
       9.2.1 Initial type testing
       9.2.2 Further type testing
       9.2.3 Sample, testing and compliance criteria
  9.3 Factory Production Control (FPC)
       9.3.1 General
       9.3.2 Testing equipment
       9.3.3 Raw materials and components
       9.3.4 Product testing and assessment
       9.3.5 Non-conforming products
Annex A (normative) Valve-type test flushing cistern
Annex B (normative) Test rig for pressure flush valve
Annex C (normative) Test rig for after-flush volume test
        C.1 Test rig for after-flush volume test for independent
            WC pans
        C.2 Test rig for after-flush volume test for one-piece
            WC pans, close-coupled suites and WC suites
Annex D (normative) Basket method
Annex E (normative) Preparation of test specimens
Annex F (normative) Valveless-type test flushing cistern
Annex ZA (informative) Clauses of this European Standard addressing
         the provisions of the EU Construction Products Directive
         ZA.1 Scope and relevant characteristics
         ZA.2 Procedure for attestation of conformity of WC pans
              and WC suites
              ZA.2.1 System of attestation of conformity
              ZA.2.2 Declaration of conformity
         ZA.3 CE marking and labelling