A negative leak test in Watford: write down what was not demonstrated

Define the question the test answered

Identify the system or outlet tested, areas excluded, equipment used, start and finish conditions, observation period and result. A pressure observation on one heating circuit does not test rainwater entry, appliance waste, another flat or every concealed domestic-water branch.

If the reported event is intermittent, record whether its usual trigger occurred. An unused shower, cold heating system or dry-weather visit may still provide evidence, but it does not reproduce use, temperature or rainfall conditions that were absent.

Use bounded language

Prefer ‘no pressure reduction was recorded on the defined circuit during the 45-minute observation’ to ‘the system has no leaks’. State the instrument resolution and any access limitation that matters to interpretation. Do not imply that a negative result proves condensation, roof ingress or another source unless that alternative was assessed.

Financial Ombudsman decisions illustrate that claims turn on the available evidence, and in some cases the absence of evidence of an escape of water is decisive. That makes precise reporting more useful than an overbroad reassurance.

Set a proportionate next step

The report may recommend monitoring, capturing the next event, checking a different boundary or returning under representative conditions. Specify what evidence would trigger that step: renewed staining, measurable meter movement, pressure loss or moisture change.

Seek professional reassessment if water remains active, electrical safety may be affected or building materials continue to deteriorate. A negative test is a dated piece of evidence, not a permanent certificate for the whole property.

Keep the original readings and photographs even when the result is negative. A later event may make the earlier baseline valuable. If a return visit uses different equipment or conditions, describe those differences before comparing the two outcomes.

Invite the occupant to confirm whether the tested conditions matched the reported event, but keep that confirmation separate from the instrument result. Their account can reveal a missing trigger without changing what the test itself recorded.