Hydrostatic testing fills the boiler with water and pressurises it above its working pressure to confirm the pressure envelope is sound. It is a controlled, water-based test precisely because water is near-incompressible, making it far safer than testing with air or gas.
What hydro testing proves
A correctly conducted hydro test verifies that welds, tubes and pressure parts hold their rated pressure with an appropriate safety margin, and reveals leaks or weaknesses before they become failures in service.
When it should be done
Hydro testing is typically required after major repairs, pressure-part replacement, or as part of a periodic statutory inspection cycle. Skipping or deferring it leaves integrity unverified and usually breaches compliance obligations.
Our inspections come with documented, traceable reports suitable for insurers and regulators, so you have proof, not just reassurance.
