can someone clear up a question please. I have just done my LPG conversion and we discussed soldering copper fittings. it does clearly say that soft solder cannot be used, but when we discussed the 37mbar low pressure side at the dwelling i am sure they said that lead free would be ok. It was something to do with using an exisiting natural domestic gas service but for LPG (not that scenario would really ever occure) i am sure that this is wrong but wanted someone else opinion with greater experience in this field.