Fire Suppression, Sprinkler & Safety System Products worked example

Valve Leak Test Rate at 99% target leak-test pass rate: a worked example

Push target leak-test pass rate up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when monitoring control valves, alarm valves, check valves, deluge valves, preaction valves, or suppression-cylinder valves.

The inputs for this scenario

  • Valves passing leak test: 242 valves (unchanged)
  • Total valves leak tested: 250 valves (unchanged)
  • Target leak-test pass rate: 99 % (raised for this scenario; the documented default is 98)

Working through the calculation

  • Applying the documented formula (Valve Leak Test Rate = valves passing leak test รท total valves leak tested) to the inputs above produces each figure below.
  • At this operating point the engine returns 96.8 % for valve leak test rate, the number this scenario is built around.
  • At this operating point the engine returns 2.2 points for gap to valve leak test rate target.
  • At this operating point the engine returns 242 valves for valves passing leak test.
  • At this operating point the engine returns 250 valves for total valves leak tested.

How this compares with the baseline

  • Against the tool's baseline example, where target leak-test pass rate sits at 98% and the headline result is 96.8 %, this scenario lands almost exactly on the baseline at 96.8 %.
  • It divides valves passing the leak test by total valves tested and expresses the result as a percentage, then shows how many points you sit below (or above) your target pass rate. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Valve Leak Test Rate: 96.8 % (headline result)
  • Gap to valve leak test rate target: 2.2 points
  • Valves passing leak test: 242 valves
  • Total valves leak tested: 250 valves

Run it with your numbers

  • Every input above is editable in the live Valve Leak Test Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.