In order to issue a gas safety certificate (CP12) the engineer has to undertake the following gas safety checks:

  • Gas supply
  • Gas appliances
  • Gas flues
  • Ventilation

What do gas safety checks include for a gas fire?

  • Check appliance for gas tightness
  • Check the appliance is working at the correct gas pressure
  • Check that the ventilation provided is adequate
  • Gas Safety Landlords engineers also check the satisfactory operation of all the flame failure devices
  • Check to ensure the piping is rigid and not flexible hose
  • Check for signs of unsafe or irresponsible operation
  • Check flame pitcher is good- should be clear blue flame
  • The gas rate and pressure of burner against recommended values also undergo gas safety checks.
  • Smoke pellet test to ensure flue is clear
  • Check catchment place behind fire is clean
  • Verify that the appliance is safe to use


An appliance can only pass all gas safety checks for landlords and have a gas safety certificate (CP12) issued when the above have all been satisfactorily completed.

A gas safety landlords certificate (CP12) can be carried out for you by a Gas Safety Landlords engineer within 24- 48 hours.

To book in your gas certificate (CP12) please call Gas Safety Landlords on 0208 951 6828 | 0333 320 0451 or email us at

Customer Reviews

Gas Safety Landlords

Customer Reviews

Angela Hitchcock

Got my CP12 this morning, thanks for your help and I will be calling you in the near future, cheers

Andrew Hayes

Being gas safe in this day and age is crucial, I had my gas certificate renewed by Gas Safety Landlords and they done a great job, I received my certificate and I am more than satisfied with the outcome, thanks again.

Andrew Fuller

The engineer that came to my house was so informative and passionate about safety in regards to gas, I have about 5 appliances in my house that use gas and he really opened my eyes to all the hazards around me. I passed my gas certificate but still I am realising how the slightest mistake could end up fatal. Thanks for all your advice and help, much appreciated.

Amy Gardener

Successful gas certificate and a satisfied customer! Thanks for your gas safety check, I will be calling you for a new one when this expires, cheers.

Jenny Reed

Just wanted to leave a review to say thank you, my certificate has successfully come through and the service I received was impeccable. I will be recommending you to all of the people I think will use your serivces. Thanks again.

Alison Murphy

My gas hose for my cooker had a rip in it due to ware and tear. I couldn't believe it, I had no idea which made it so much more dangerous. I haven't used my cooker in a while due to work schedules but getting a gas certificate was like a sign, I could have easily used the cooker and seriously hurt myself. Thank you very much and I will be calling you back for another gas certificate as I have failed this one.

Alex Fredericks

I had no problems with the service at all and I received my certificate on time. Thanks for your help lads!

Sam Peterson

Received the CP12 for my property at the advised time, I am happy with the service I received from this company, their social interaction is great. They seem like people who enjoy their job.

Adam Agirling

Thanks for my Gas Certificate lads, great service and great company. I will definitely pass the word round.