Working pressure + surge may be possible, however most documentation regards rated pressure X 1.5. The valves would be rated above; Working pressure + surge, however they have been in operation for some time and if one was to fail the damage caused to the residence could be high.
Does anyone know of any good documentation on testing active mains under low pressures (long durations)?
I have an existing development to test and will have to test against valves; so i want to try to find a balance between being able to measure the pressure/volume difference and blowing the...
