Factsheets - Gas rating

Whilst all advice given is correct to the best of our knowledge, we cannot be held responsible for any problems should you choose to take our advice. If you’d like some advice on any of these issues, contact our London plumbers on 0208 964 6714.

Plumbing Glossary
Emergency plumbing
What to look for in a good plumber

How to disconnect & reconnect a washing machine
How to disconnect & reconnect a dishwasher
Buying a bathroom suite
Purchasing a Shower
Showers - flow and control
Showers - choosing a tray and door
Mould in bathrooms and showers
Taps and shower valves
How to replace a tap washer
How to replace tap cartridge for quarter turn taps

Earth bonding
Preparing for winter
Advice when doing building work

Power showering in flats
Water pressure
Pressure and stored hot water
Flow and pressure
Water softeners

Boiler problems – what to look out for and when to contact a plumber
How to tell if it’s time to replace your boiler
Boiler breakdowns
Things to consider when looking for a new boiler
Heating Systems - sealed or vented?
Flushing your heating system
How to stop cold spots in your radiators
How to look after your home central heating
Gas Rating
Asbestos Awareness

Please call us for queries or help with anything on 0208 964 6714 (24 hours a day)

Gas Rating problems with existing pipework

Please note that only Corgi registered people can work on gas appliances. All gas appliances need to be registered with Corgi when they are changed or installed. This includes cookers, gas hobs and boilers.

There are strict rules about the amount of gas required for every appliance. If there is not enough gas available for the requirements of the appliance then the appliance could be dangerous.

It is usually possible to do a rough calculation to establish whether there will be enough gas for the appliances that will be connected. However, this can never be definitive especially when pipes are concealed etc.

Unfortunately it is impossible to test that the correct amount gas needed for the appliance to burn correctly without having the appliance connected.

If when the final commissioning checks are carried out and there is not enough gas, then the appliance fails. It will then require that the pipework be adapted or re-run so that enough gas is delivered to all the appliances working off that meter.

Re-running the gas piping to an existing appliance can lead to considerable disruption and cost.