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Gas Tightness Test Certificate Template

Certify that a gas system is leak-free after installation or repair. Record test pressure, duration, pressure drop, and result. Open the template in the online editor to start.

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Gas Tightness Test Certificate

No.GTTC-2026-042

1. General Information

Inspection date7/14/2026 Address12 Station Road, Manchester M1 2AB
Expert David Green , Gas Safe Registered Engineer

2. Object of Inspection

Object typenot filled in Object nameNew boiler gas supply pipework

3. Main Parameters

Test Pressure20 Test Duration2
Pressure Drop0.5 Test ResultPass

4. Additional Parameters

Equipment Used: Kane 458 Pressure Gauge Observations: No leaks detected. System held pressure.

5. Additional Information

Identification was carried outNew gas pipework for boiler installation
There are remarksTest passed. System is gas-tight.

6. Inspection Participants

No.Full namePosition / statusComment
1David GreenGas Safe Registered EngineerPerformed test
2Robert WilsonWitness (Homeowner)Present during test

Signatures

______________________________
David Green, Gas Safe Registered Engineer
______________________________
David Green
______________________________
Robert Wilson

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Purpose and Procedure for Drafting the Document

What Is a Gas Tightness Test Certificate?

A gas tightness test certificate is a formal document that provides evidence that a gas system has been tested for leaks and meets the required standards. It records the test pressure, duration, pressure drop, and pass/fail result.

Who Uses This Template?

This template is used by Gas Safe registered engineers to certify the integrity of gas pipework after installation, repair, or modification. It may also be required by building owners or regulatory bodies as proof of compliance.

Key Features

The template includes sections for test details, system information, equipment used, observations, and signatures. It also requires photo evidence of the pressure gauge reading and test equipment setup.

New Gas Installation

After installing new gas pipework, this certificate confirms that the system is gas-tight and safe to use.

Gas Repair or Modification

Following a repair or modification to existing gas pipework, a tightness test is required to ensure no leaks were introduced.

Pre-Commissioning

Before commissioning a gas appliance or system, this certificate provides documented proof that the pipework holds pressure.

Compliance Documentation

The certificate may be submitted to building control, insurance companies, or gas network operators as part of compliance records.

  1. 1

    Isolate System

    Isolate the gas system and ensure all appliances are turned off.

  2. 2

    Connect Test Equipment

    Connect the pressure test equipment to the system and pressurize to the required test pressure.

  3. 3

    Hold Pressure and Monitor

    Hold the pressure for the specified duration and monitor for any pressure drop.

  4. 4

    Complete Certificate

    If the test passes, release pressure, reconnect the system, and complete the Gas Tightness Test Certificate with all details and signatures.

Photo Report Generator

Generate a professional certificate with photos of the pressure gauge and test setup using the photo report generator.

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Mobile Photo Documentation App

Capture photos of the pressure gauge reading and test equipment on site with the mobile app for inclusion in the certificate.

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Document Sections

Click a section to jump to it in the sample document.

General Information

Records the test date, installation location, and Gas Safe registered engineer details.

Object of Inspection

Identifies the gas system being tested, including a description of the pipework and appliances.

Main Parameters

Records the test pressure, duration, pressure drop, and pass/fail result.

Additional Parameters

Records details of test equipment used and any observations during the test.

Additional Information

Provides a summary of the test and any relevant notes.

Inspection Participants

Lists the engineer and any witness present during the test.

Signatures

Captures the signatures of the engineer and witness to certify the test.

Document Fields and Columns

General Information

Inspection date
Date when the pressure test was performed.
Address
Address or location of the gas installation.
Expert
Name and Gas Safe registration number of the engineer.

Object of Inspection

Object type
Type of gas system tested, e.g., pipework, installation.
Object name
Description of the system tested.

Inspection Participants

No.
Sequential number for each participant.
Full name
Full name of the participant.
Position / status
Role of the participant, e.g., engineer, witness.
Comment
Any additional comments about the participant.

Frequently Asked Questions about Photo Reports and Photo Tables

What is a gas tightness test?

A gas tightness test is a pressure test performed on gas pipework to check for leaks. The system is pressurized to a specified level and held for a set duration; if the pressure drop is within acceptable limits, the test passes.

Who can perform a gas tightness test?

Only a Gas Safe registered engineer should perform a gas tightness test. The engineer is responsible for conducting the test correctly and completing the certificate.

What information is recorded on the certificate?

The certificate records the test date, test pressure, duration, pressure drop, pass/fail result, system description, installation location, equipment details, observations, and signatures of the engineer and witness.

Is a witness signature required?

A witness signature is optional but recommended. The witness may be the property owner, contractor, or another engineer. The engineer's signature is mandatory.

How does this certificate differ from a Gas Pressure Test Record?

Both documents record pressure test results, but the Gas Tightness Test Certificate is specifically for tightness tests after installation or repair, while the Gas Pressure Test Record may include other types of pressure tests (e.g., strength tests) and is more general.

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