What did you do to your Patrol today!

[PeeBee]

They can put a UV dye in with the gas and any leak, however small, can be seen with a black light.

Thanks Bill, yes they did that however nothing showed up. I have now purchased a UV torch for that process. Some of the hoses and fittings are buried beneath layers of other stuff, hence its difficult to see a leak without some disassembly. I will do these over the next couple of days to see if I can find the leak myself, which will make any subsequent visit cheaper.