Commercial Gas Tightness Test in Chelmsford

Pricing depends on the size of your premises, the number of appliances and any access requirements. We always provide a fixed written quote before any work starts in Chelmsford.

Yes. All of our engineers are Gas Safe registered for the relevant commercial categories (COMCAT 1–5, CODNCO1, CORT1) and carry the right qualifications for commercial gas tightness test in Chelmsford.

For most Chelmsford jobs we can attend the same day or next day. For emergencies we offer a 24/7 call-out service across Chelmsford and surrounding areas.

Yes — every job is completed with the correct documentation, whether that is a CP-series certificate, a tightness test record, a service report or an interlock commissioning certificate.

Yes. We cover restaurants, pubs, hotels, schools, care homes, offices and industrial sites across Chelmsford and the surrounding areas — including landlords, managing agents and facilities companies.

It verifies that the system can maintain the correct gas pressure safely. Required by law, a gas-tightness test must be performed whenever gas systems are installed, modified, or repaired. It's also included in yearly gas safety checks for businesses that use gas-powered equipment.

Gas Safety (installation & use) Regulations 1998 GS(I&U)R Reg 35: These require employers, including schools, to conduct gas tightness testing to ensure that gas fittings & flues are maintained in a safe condition so as to prevent risk.

The test is carried out on the membrane immediately after its installation and prior to it being covered up by the ensuing construction processes. The area below the membrane is temporarily pressurised with a mixture of clean air and a specialist tracer gas which seeks out and identifies any leaks within the membrane.

b) Tightness test pressure between 20 and 21 mbar. ❖ 1 minute pressure and temperature stabilisation (may require longer for a stable reading to be achieved). ❖ 2 minute tightness test (where necessary adjust pressure to between 20 and 21 mbar before commencing test).