Can anyone tell me if you solved your problem and how? A national Grid man said in passing that exchanging an upright meter for a horizontal one which i think was called a G4 could stop the noise. Our provider is ESP and they changed a 3 year old upright meter for a similar new one and the noise is still happening with any demand on gas. We are trying to get them to install a flatter meter with less of an echo or vibration potential but they say they dont use them. We say tough and they need to use them. The problem is the pressure is acceptably high in our rural location but the present metres in our newbuild close of 5 homes cant cope and they hum, scream and ring sometimes across the whole house. We understand that the regulators could be damaged by this set of circumstances as well as attracting every insect in the world..the infernal collective hum of meters has them thinking we are a hive!! Has anyone else got ESP independent supplier? So far they are very very difficult to contact. National Grid say the gas supply is safe-we are not in danger but we cant live with this noise..losing a lot of sleep and patience. )o: