Hydrostatic Test Pressure and Hold
Test pressure (1.5x water / 1.25x gas) and recommended hold time.
Example
You enter
- Working pressure (psi) 100
- System volume (gal) 200
- System type water
You get
- Test pressure 150 psi
- Multiplier 1.5
- Hold time 30 min
Details, formula, and sources
Test pressure: 1.5× working pressure for water systems (IPC 2021 Section 312), 1.25× for fuel-gas systems (IFGC 2021 Section 406.4); recommended hold time scales with system volume.
IPC 2021 (International Plumbing Code). Section 312; IFGC 2021 (International Fuel Gas Code) / NFPA 54. Section 406.4.
Free read-only access at codes.iccsafe.org.
Estimate. AHJ and licensed plumber / gas fitter govern. Verify against the IPC / IFGC edition adopted in your jurisdiction.
Field names used by the API: working_pressure_psi, system_volume_gal, material, test_pressure_psi, multiplier, hold_minutes
- Default hold time ≥ 15 min for plumbing tests; ≥ 10 min for fuel-gas testsIPC 2021 Section 312.3 / IFGC 2021 Section 406.4