Fuel Lines
Jim,
Be sure you use the proper spec for the teflon hose. Fuel flowing through an insulated line develops static charge and the aircraft spec has carbon in the teflon to dissipate the charge. Most applications dont flow fast enough to create this, so it is not common "on the street". Check other threads here and you will find it. I have recent data on a test where 60,000 volts was generated in a plastic line. It will create pinholes and weep.
Good Luck!