I have a problem with the connection points,Some don't leak at all and some leak badly! I have tried using some vasiline on the fittings while installing to help it slide into the fitting and I have wrapped additional teflon tape to fill in the void. Does Anybody have the answer to my problem? Thanks in advance.PS I dont want to glue it!I am using netifim fittings and the OD corisponds with the tape.