NEN EN 14124 : 2004

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
5 Design and manufacture
   5.1 Composition of the inlet valve
   5.2 Connection to the supply network
   5.3 Adjustment of the water level
   5.4 Dimensions of the threaded end connections
6 Mechanical and hydraulic characteristics
   6.1 Threaded end connections
       6.1.1 General
       6.1.2 Tensile strength
       6.1.3 Resistance to tightening torque
   6.2 Backflow prevention
       6.2.1 General
       6.2.2 Dimension of the air inlet
       6.2.3 Efficiency of the air inlet
   6.3 Leaktightness
       6.3.1 Leaktightness under static pressure
       6.3.2 Leaktightness under dynamic pressure
   6.4 Flow rate and filling time
   6.5 Reopening of the inlet valve
   6.6 Water hammer
   6.7 Resistance to pressure
   6.8 Endurance
7 Tests
   7.1 General
   7.2 End connections
       7.2.1 Tensile test and torque test apparatus
       7.2.2 Tensile test operating method
       7.2.3 Torque test operating method
   7.3 Backflow prevention
       7.3.1 Test apparatus
       7.3.2 Operating method
   7.4 Leaktightness
       7.4.1 Test apparatus
       7.4.2 Static pressure test method
       7.4.3 Dynamic pressure test method
   7.5 Inlet flow rate
       7.5.1 Test apparatus
       7.5.2 Test method
   7.6 Reopening of the inlet valve
       7.6.1 Test apparatus
       7.6.2 Test method
   7.7 Water hammer
       7.7.1 Test apparatus
       7.7.2 Test method
   7.8 Resistance to pressure
       7.8.1 Test apparatus
       7.8.2 Test method
   7.9 Endurance
       7.9.1 Test apparatus
       7.9.2 Test method
8 Acoustic characteristics
9 Marking
10 Designation
Annex A (informative) Test method used to verify
        the acoustic characteristics

Covers the dimensional, hygiene, tightness, pressure performance, hydraulic, acoustic, mechanical and physico-chemical characteristics which inlet valves for flushing cisterns shall comply with the test methods for testing these characteristics marking and presentation.