Proportioning valve help

[akrapovic]

Hey guys,

I'm having issues with a leaking proportioning valve. I'm on my third one. Everyone is leaking on the out side to the rear brake lines. It is leaking at the adapter that goes into the valve line fitting is fine. Initially it was fine but after a 30 min drive it began to leak when the brake was applied. It is a slow drip but a problem none the less. I know it's not the preferred method but I even tried teflon tape. Should I tighten when the car is warmed up? That's when it seems to leak. Just looking for and tips or suggestions. I have attempted to tighten but doesn't seem to help. Oh yeah, it is a Baer proportioning valve. I'm using 1/4 aluminum factory type lines, c5 master and booster and c5 4 wheel disc brakes.

As always thanks in advance