DIN 3266-2:1987-12

1 Field of application
2 Scope of checking for compliance with the general
      requirements
3 Testing of tightness and strength
      3.1 Testing of tightness at the transition from
             gauge pressure to vacuum pressure
      3.2 Testing of tightness at 0,05 bar
      3.3 Testing of tightness from 0 bar upwards
      3.4 Testing of tightness and strength at 15 bar
4 Testing of set pressure, opening pressure and closing
      pressure
      4.1 Testing of set pressure of Types A2, C, D, E
             and F valves
      4.2 Testing of opening pressure/set pressure of
             Type A3 valves
      4.3 Testing of closing pressure of Type A3 valves
5 Testing of intake pressure
6 Endurance test
7 Water hammer test
8 Checking of limit values for dripping water
9 Testing of actuating and control elements
10 Testing of composite fittings
11 Assessment of noise nuisance
12 Final check for compliance with the general
      requirements
Standards and other documents referred to

Specifies methods of testing pipe interrupters, pipe disconnectors and anti-vacuum valves ('valves', for short) complying with DIN 3266 Part 1 for fittings mounted in drinking water installations as specified in the DIN 1988 series of standards for use in both cold and hot water systems. The DIN/DVGW test mark is granted on the basis of the results of these tests.