Dump valve, difficulty dumping air in a normal position.

[Heruhur]

I have a waterproof Draco (crushed neoprene) drysuit
and more or less since I've got it I have difficulty dumping air.
It seems the only way to let the excess air out is to flip myself
in a bit of a backwards position. (chest facing the surface)
Staying in a face down position and raising the dump valve
(making sure it's the highest point) will not get the air out.
I already replaced the dump valve for a new one to no avail.
I use the bodytec undersuit, so it couldn't be the suit plugging the valve could it?
(BTW I do NOT trim on my drysuit, I just lift the squeeze a bit)

Is this normal? Do more people experience this?
(I know the waterproof dump valve's are in a bit of a forward facing position,
but there's lot's of divers with no issues so this would seem an unlikely cause of the issue.)
Am I doing something wrong?

 

[Landau]

With my Bare suit I need to roll to about 45 degrees left side up and feet down a bit to get the dump valve to dump on demand. Its about the same motion as I use to dump the BC with my inflator hose.

I've noticed buddies head up with lots of air in the neck area of their suits when attempting to dump. It was above the valve so not coming out. Maybe have your buddies watch where the air goes while you are attempting to dump.

 

[Heruhur]

With my Bare suit I need to roll to about 45 degrees left side up and feet down a bit to get the dump valve to dump on demand.

That is how I would expect a dry suit to dump. I'll have my buddy check.

Unfortunately it's gonna have to wait for a while. . . . the suit's gotta go to the repair guy. Leak detected :-(