[johnbuckley]

Hi Jim/GA Whilst I agree that theoretically " ...there is no need for sealant or tape ...." . Many fuel unions are not in the best condition any more. I routinely use oil/gas proof PTFE tape on problem areas and find it a very useful adjunct; particluarly if the components are being re-used. As other posts have stated make sure the PTFE tape is the gas proof type.