Sigh, I know this must be a troll.Advantages to balanced P-valve (not just Trigon, but any balanced P-valve) is that you do not need to remember to prime it before getting wet. So you won't have to fight to get that first pee out when hose gets crushed. Might be rare, but it's a possibility.
They DO NOT need to be PRIMED. It's a myth repeated over and over again by people who don't understand how they work. There is not pressure to fight against!
If you really didn't understand my explanations read the one Aleksolson wrote in the other thread. Or don't, whatever.
I honestly tried to give information and now I'm basically be harassed for it.