My wife says sometimes she can smell gas near our hob.I cannot smell anything myself but have dragged out the built under electric oven a couple of times and soap tested the lines and joints and found nothing.Nothing has changed since we had it fitted about 3 years ago.Today I have borrowed a U tube from work and connected up on the meter and the tube lost less than 0.1iwg over 15 mins.Am I right in thinking that bit could pass through the liquid in the tube.thanks