Ham Shandy

Theres nothing wrong with using old hoses as long as they are in good condition. As for competent it depends upon your knowledge/training, what was the working pressure ? Pressure drop between meter and appliance ? how did you test the new cooker for leaks (internally) ? And what sort of stability device did you use ? Do you know what the minimum ventilation requirements are for different sized rooms ? Unless you can answer all those questions and possibly more the law would not look upon you as being competent, also how would you register the appliances installation which is now a legal requirement and can only be done by CORGI registered engineers ? Holy crap just realised this is a year old !!!