I would take off all connections and give them a really good wrapping of plummers tape and i mean a good wrap,by that i mean when you unscrew again you can see that the tape is well grooved on to the thread.Like i said on the other thread Joe when i was using microbore pressure problems were a day in day out stress,when you can buy minibore although it`s only 2mm bigger it does make all the difference the slightly bigger internal diameter stops all these pressure problems in my experience,also nothing to do with this but you have disconnected the pressure switch havn`t you.