Which systems does this cover?
Any pressurised system you test and certify — gas tightness tests, heating and hot water systems, sprinkler and fire suppression systems, compressed air, and pipework generally. The system type and description are recorded per test rather than assuming one discipline.
Why record both allowable and actual drop?
Because 'pass' hides the margin. A system that lost exactly its allowable drop behaved very differently from one that lost nothing, and if that system fails six months later the difference is the first thing anyone will ask about.
Does a failed test create a follow-up?
The record carries a retest-required flag and a retest date, along with the remedial action taken, so an unresolved failure is visible rather than closed by silence.
Can I give the customer a copy?
Yes. The record is against the customer and site, and Gaffer produces PDF documentation from your records, so the test can be issued as evidence alongside the certificate for the work.