I recently made the switch from a wedge tank to a 4oz Dubro clunk tank to feed my OS FP 35. I have a pressure line from the muffler to the uniflow vent. It runs very well and I like it much better. But after I fill the tank, while I'm waiting my turn to fly, I don't want the fuel dribbling through the pressure line, so I've been clamping it, but wondered about putting in a check valve. I've seen people do this with backplate pressure lines on Tee Dees, but I wondered if the one way valve could cause too much pressure to build up in the tank. Of course, the volume of fuel is dropping as the engine runs. Does that completely offset the buildup? Will the valve affect my run, or should I see any difference with or without the valve?
Thanks.
Rusty