//Glossary
Pressure test
Isolating a section of water or gas piping, pressurizing it, and watching a gauge to see whether the pressure holds. A drop means the section is losing water or gas somewhere.
Why test before repairing?
It tells you which line is leaking before anything is opened, and it proves the repair afterward. On gas piping the test is also what the utility and the inspector rely on to confirm the system is tight.
Guides that use this term
- › How electronic leak detection works: finding a leak without opening walls
- › Slab vs raised foundation: what your foundation changes about plumbing repairs
- › What to do when a pipe bursts: the first five minutes
- › Gas line basics: sizing, testing, and which jobs need a permit
- › Do you need a permit for a gas line?
- › Do you need a permit for a whole-house repipe?
- › What a plumbing inspector checks, and what happens if something fails
- › Water meter spinning or a high water bill: how to confirm a hidden leak
- › What leak detection costs, and why the number is not on this page
Related terms
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