Is this dropping to 3mb at the boiler or the gas meter.
If it is at the meter then you need to call transco straight away, your engineer should have made safe and done this for you?
If the meter is ok but it is dropping at the boiler, then it is either a restriction in the supply or the pipe size needs to be increased to 28mm. How far is the boiler from the gas meter.
gary.wright53@googlemail.com
March 2008